Chem Exam 1 Review – Flashcards

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question
5.21 cm is the same distance as A) 0.0521 m B) 52.1 dm C) 5.21 mm D) 0.00521 km E) 5210 m
answer
0.0521 m
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How many centimeters are there in 57.0 in.? A) 22 cm B) 0.0445 cm C) 145 cm D) 22.4 cm E) 140 cm
answer
145 cm
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The amount of space occupied by a substance is its A) mass B) density C) weight D) length E) volume
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volume
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Which of the following is the basic unit of volume in the metric system? A) liter B) kilogram C) meter D) centimeter E) gram
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liter
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Which of the following is a measurement of mass in the metric system? A) milliliter B) centimeter C) kilogram D) Celsius E) meter
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kilogram
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A value of 25° C is a measurement of A) distance B) volume C) temperature D) mass E) density
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temperature
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A value of 36 mL is a measure of A) density B) mass C) temperature D) volume E) distance
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volume
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A value of 345 mm is a measure of A) density B) mass C) temperature D) volume E) distance
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distance
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The measurement 0.0000043 m, expressed correctly using scientific notation, is A) 4.3 × 10^-7 m B) 4.3 × 10^-6 m C) 4.3 × 10^6 m D) 0.43 × 10^-5 m E) 4.3 m
answer
4.3 × 10^-6
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Which of the following conversion factors is a measured number? A) 10 cm/dm B) 12 in/ft C) 16 oz/lb D) 25 miles/gallon E) 12 eggs/dozen
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25 miles/gallon
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The measurement of the gravitational pull on an object is its A) volume B) weight C) mass D) length E) size
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weight
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Which of the following measurements has three significant figures? A) 0.005 m B) 510 m C) 0.510 m D) 0.051 m E) 5100 m
answer
0.510 m
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1.00 pint of milk has a volume of how many milliliters? A) 472 mL B) 530 mL C) 1000 mL D) 1890 mL E) 106 mL
answer
472 mL
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Which of the following numbers contains the designated CORRECT number of significant figures? A) 0.04300 - 5 sig figs B) 0.00302 - 2 sig figs C) 156,000 - 3 sig figs D) 1.04 2 - 2 sig figs E) 3.0650 - 4 sig figs
answer
156,000 - 3 significant figures
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The number of significant figures in the measurement of 45.030 mm is A) none B) three C) four D) five E) six
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five
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How many significant figures are in the number 0.00208? A) six B) two C) three D) four E) five
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three
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Which of the following examples illustrates a number that is correctly rounded to three significant figures? A) 4.05438 grams to 4.054 grams B) 0.03954 grams to 0.040 grams C) 103.692 grams to 103.7 grams D) 109,526 grams to 109,500 grams E) 20.0332 grams to 20.0 grams
answer
20.0332 grams to 20.0
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A calculator answer of 423.6059 must be rounded off to three significant figures. What answer is reported? A) 423 B) 424 C) 420 D) 423.6 E) 423.7
answer
424
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Which of the answers for the following conversions contains the correct number of significant figures? A) 2.543 m × 39.4 in/1 m = 100.1942 B) 2 L × 1.06 qt/1 L = 2.12 qt C) 24.95 min × 1 hr/60 min = 0.4158 hr D) 12.0 ft x 12 in/1 ft × 2.54 cm/ 1 in = 370 cm E) 24.0 kg × 1 lb/2.20 kg = 11 lb
answer
24.95 min × 1 hr/60 min = 0.4158 hr
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What is the correct answer for the calculation of a volume (in mL) with measured numbers 28.58/16 × 8.02? A) 0.22 mL B) 0.223 mL C) 57 mL D) 14 mL E) 14.3 mL
answer
0.22 mL
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When 2610 + 11.7 + 0.22 are added, the answer to the correct number of decimal places is A) 2621.92 B) 2621.9 C) 2622 D) 2620 E) 2600
answer
2620
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What is the answer, with the correct number of decimal places, for this problem? 4.392 g + 102.40 g + 2.51 g = A) 109.302 g B) 109 g C) 109.3 g D) 109.30 g E) 110 g
answer
109.30 g
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The correct answer for the addition of 7.5 g + 2.26 g + 1.311 g + 2 g is A) 13.071 g B) 13 g C) 13.0 g D) 10 g E) 13.1 g
answer
13 g
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Which of the following measurements are NOT equivalent? A) 25 mg = 0.025 g B) 183 L = 0.183 kL C) 150 msec = 0.150 sec D) 84 cm = 8.4 mm E) 24 dL = 2.4 L
answer
84 cm = 8.4 mm
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In which of the following is the metric unit paired with its correct abbreviation? A) microgram / mg B) milliliter / mL C) centimeter / km D) kilogram / cg E) gram / gm
answer
milliliter / mL
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Which of the following is the largest unit? A) millimeter B) micrometer C) meter D) decimeter E) kilometer
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kilometer
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What is the metric relationship between grams and micrograms? A) 1 g = 100 ?g B) 1 g = 1,000,000 ?g C) 1 g = 0.000001 ?g D) 1 g = 1000 ?g E) 1 g = 0.001 ?g
answer
1 g = 1,000,000 ?g
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What is the conversion factor for the relationship between millimeters and centimeters? A) 1 mm/ 1 cm B) 10 mm/ 1 cm C) 1 cm/ 1 mm D) 100 mm/ 1 cm E) 10 cm/ 1 mm
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10 mm/ 1 cm
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Which of the following is the smallest unit? A) gram B) milligram C) kilogram D) decigram E) microgram
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microgram
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The cubic centimeter has the same volume as a A) cubic inch B) cubic liter C) milliliter D) centimeter E) cubic decimeter
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Milliliter
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9.31 g is the same mass as A) 931 ?g B) 931 kg C) 93.1 cg D) 9310 mg E) 0.0931 dg
answer
9310 mg
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According to the United States Food and Drug Administration, the recommended daily requirement of protein is 44 g. This is __________ of protein. A) 1248.5 oz B) 320,000 oz C) 1.6 oz D) 0.0605 oz E) 150,000 oz
answer
1.6 oz
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Which of the following setups would convert centimeters to feet? A) cm × 2.54 in/1 cm × 1 ft/12 in B) cm × 2.54 cm/1 in × 12 in/ 1 ft C) cm × 1 in/ 2.54 cm × 1 ft/ 12 in D) cm × 1 in/ 2.54 cm × 12 in/ 1 ft E) cm × 2.54 cm/1 in × 1 ft/12 in
answer
cm × 1 in/ 2.54 cm × 1 ft/ 12 in
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A conversion factor set up correctly to convert 15 inches to centimeters is A) 100 cm/1 m B) 1 inch/2.54 cm C) 1 cm/10 mm D) 2.54 cm/1 inch E) 10 cm/1 inch
answer
2.54 cm/1 inch
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How many pounds are in 3.5 kg? A) 7.7 lb B) 1.59 lb C) 0.629 lb D) 1.6 lb E) 7.70 lb
answer
7.7 lb
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How many liters of soft drink are there in 5.25 qt? A) 4950 L B) 55.7 L C) 4.95 L D) 5.57 L E) 5.0 L
answer
4.95 L
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What is 6.5 m converted to inches? A) 1700 in B) 1651 in C) 39 in D) 260 in E) 255.9 in
answer
260 in
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How many kilograms are in 30.4 lb? A) 13.8 kg B) 14 kg C) 67 kg D) 66.99 kg E) 66.9 kg
answer
13.8 kg
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A nugget of gold with a mass of 521 g is added to 50.0 mL of water. The water level rises to a volume of 77.0 mL. What is the density of the gold? A) 10.4 g/mL B) 6.77 g/mL C) 1.00 g/mL D) 0.0518 g/mL E) 19.3 g/mL
answer
19.3 g/mL
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A dose of aspirin of 5.0 mg per kilogram of body weight has been prescribed to reduce the fever of an infant weighing 8.5 pounds. The number of milligrams of aspirin that should be administered is A) 19 mg B) 53 mg C) 1.6 mg D) 5.0 mg E) 0.59 mg
answer
19 mg
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A doctor's order is 0.125 g of ampicillin. The liquid suspension on hand contains 250 mg/5.0 mL. How many milliliters of the suspension are required? A) 0.0025 B) 3.0 mL C) 2.5 mL D) 6.3 mL E) 0.0063 mL
answer
2.5 mL
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Which of the following substances will float in gasoline, which has a density of 0.66 g/mL? A) table salt (d = 2.16 g/mL) B) balsa wood (d = 0.16 g/mL) C) sugar (d = 1.59 g/mL) D) aluminum (d = 2.70 g/mL) E) mercury (d = 136 g/mL)
answer
balsa wood
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What is the mass of 2.00 L of an intravenous glucose solution with a density of 1.15 g/mL? A) 0.023 kg B) 2.30 kg C) 1.15 kg D) 0.015 kg E) 0.58 kg
answer
2.30 kg
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Mercury has a specific gravity of 13.6. How many milliliters of mercury have a mass of 0.35 kg? A) 0.0257 mL B) 0.026 mL C) 25.7 mL D) 26 mL E) 4760 mL
answer
26 mL
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What is the density of a substance with a mass of 45.00 g and a volume of 26.4 mL? A) 1.70 g/mL B) 1.7 g/mL C) 25.7 mL D) 26 mL E) 4760 mL
answer
26 mL
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What is the mass of 53 mL of ethyl alcohol, which has a density of 0.79 g/mL? A) 67.1 g B) 41.9 g C) 42 g D) 67 g E) 53 g
answer
42 g
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A liquid has a volume of 34.6 mL and a mass of 46.0 g. What is the density of the liquid? A) 1.00 g/mL B) 1.33 g/mL C) 0.752 g/mL D) 1330 g/mL E) 0.663 g/mL
answer
1.33 g/mL
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The density of a solution is 1.18 g/mL. Its specific gravity is A) 11.8 B) 0.118 C) 0.847 D) 1.18 E) 1.2
answer
1.18
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Diamond has a density of 3.52 g/mL. What is the volume in cubic cm of a diamond with a mass of 15.1 g? A) 4.3 cm^3 B) 4.29 cm^3 C) 0.233 cm^3 D) 53 cm^3 E) 53.2 cm^3
answer
4.29 cm^3
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The ratio of the mass of a substance to its volume is its A) specific gravity B) density C) buoyancy D) weight E) conversion factor
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density
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The EPA limit for the lead in the soil of play areas is 400 ppm. This is the same as A) 400 mg lead in each gram of soil B) 400 g lead in each kilogram of soil C) 400 mg lead in each kilogram of soil D) 400 ?g lead in each kilogram of soil E) 400 ?g lead in each milligram of soil
answer
400 mg lead in each kilogram of soil
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Which of the following is often used to determine an individual's percentage of body fat? A) temperature B) height C) weight loss D) weight gain E) density
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density
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A 50.0 mL urine sample has a mass of 50.7 g. The specific gravity of the urine is A) 1.014 g/mL B) 0.986 g/L C) 1.01 D) 0.986 E) 50.7
answer
1.01
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An example of kinetic energy is A) a coiled spring B) running water C) a tree D) natural gas E) chemical energy
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running water
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The energy associated with the motion of particles in a substance is called A) temperature B) electrical energy C) heat D) chemical energy E) potential energy
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heat
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Which of the following is an example of potential energy? A) chewing food B) water stored in a reservoir C) burning wood D) a fan blade turning E) riding an exercise bike
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water stored in a reservoir
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The phrase "ability to do work" is a definition of A) specific heat B) energy C) calorie D) heating E) cooling
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energy
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The energy stored in chemical bonds is A) specific heat B) kinetic energy C) potential energy D) work E) a calorie
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potential energy
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The energy of motion is referred to as A) work B) freezing C) specific heat D) potential energy E) kinetic energy
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kinetic energy
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Global warming is believed to result from all of the following except A) burning of fossil fuels B) increasing levels of carbon dioxide in the atmosphere C) deforestation D) movement of the earth closer to the sun E) carbon dioxide trapping the heat produced by the sun
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movement of the earth closer to the sun
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In which of the following would the particles move most rapidly? A) ice at -20°C B) water at 20°C C) steam at 110°C D) boiling water E) ice at 0°C
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steam at 110°C
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650 J is the same amount of energy as A) 155 cal B) 2720 cal C) 650 cal D) 1550 cal E) 2.72 cal
answer
155 cal
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3.25 kcal is the same amount of energy as A) 3.25 J B) 0.777 J C) 777 J D) 13600 J E) 13.6 J
answer
13600 J
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A potato contains 20 g of carbohydrate. If carbohydrates have a caloric value of 4 kcal/g, how man kcal are obtained from the carbohydrates in the potato? A) 5 kcal B) 20 kcal C) 40 kcal D) 60 kcal E) 80 kcal
answer
80 kcal
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One cup of kidney beans contains 15 g of protein, 1 g of fat, and 42 g of carbohydrate. How many kilocalories, to two significant figures, does this sample contain? (the caloric values are: 4 kcal/g for carbohydrate, 9 kcal/g for fat, and 4 kcal/g for protein.) A) 60 kcal B) 88 kcal C) 230 kcal D) 240 kcal E) 520 kcal
answer
240 kcal
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A cheeseburger from a fast food restaurant contains 19 g of fat, 20 g of carbohydrate, and 28 g of protein. How many kcal of energy does the cheeseburger contain? A) 70 kcal B) 360 kcal C) 17 kcal D) 630 kcal E) 280 kcal
answer
360 kcal
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A serving of fish contains 50 g protein and 4 g of fat. If protein has a caloric value of 4 kcal/g and fat has 9 kcal/g, how many kcal are in the serving? Give the answer to 2 significant figures. A) 240 kcal B) 54 kcal C) 470 kcal D) 220 kcal E) 490 kcal
answer
240 kcal
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A slice of pizza contains 28g of carbohydrate, 13g of protein and fat. if the pizza contains 280 kcal, how many grams of fat are present? A) 28 g B) 13 g C) 10 g D) 55 g E) 250 g
answer
13 g
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The dietary calorie is equal to A) 1000 kcals B) 1000 cals C) 100 cals D) 10 cals E) 1 calorie
answer
1000 calories
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A temperature of 41°F is the same as A) 5°C B) 310°C C) -9°C D) 16°C E) 42°C
answer
5°C
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If the temperature is 20°C, what is the corresponding temperature on the Fahrenheit scale? A) -22°F B) 68°F C) 43°F D) 239°F E) 94°F
answer
68°F
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If the temperature is -55°F, what is the corresponding temperature on the Kelvin scale? A) 225 K B) 218 K C) 55 K D) 273 K E) 328 K
answer
225 K
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A patient has a temperature of 38.5°C. What is the temperature in degrees Fahrenheit? A) 70.5°F B) 311°F C) 126.9°F D) 101.3°F E) 11.7°F
answer
101.3°F
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The temperature of liquid nitrogen is -196°C. What is the corresponding reading on the Kelvin scale? A) 77 K B) -127 K C) -91 K D) 48 K E) 146 K
answer
77 K
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On a hot day, the thermometer read 95°F. What is the temperature in degrees Celsius? A) 77°C B) 113°C C) 35°C D) 63°C E) 178°C
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35°C
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Absolute zero is
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the coldest temperature possible
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The specific heat of a substance is the amount of heat needed to
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raise the temperature of 1 g of the substance by 1°C
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A kilocalorie of heat is required to raise the temperature of
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100 g of water by 10°C
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How many calories are required to raise the temperature of a 35.0 g sample of iron from 25°C to 35°C? Iron has a specific heat of 0.108 cal/g °C. A) 38 cal B) 1.1 cal C) 3.8 cal D) 93 cal E) 130 cal
answer
38 cal
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How many calories are required to raise the temperature of a 150 g sample of gold from 25°C to 175°C? The specific heat of gold is 0.0308 cal/g °C. A) 4.62 cal B) 116 cal C) 22500 cal D) 693 cal E) 130 cal
answer
693 cal
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How many calories are required to increase the temperature of 13 g of alcohol from 11°C to 23°C? The specific heat of alcohol is 0.59 cal/g °C. A) 83 cal B) 0.63 cal C) 92 cal D) 0.54 cal E) 170 cal
answer
92 cal
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The specific heat of copper is 0.093 cal/g °C, and the specific heat of silver is 0.057 cal.g °C. If 100 cal of heat is added to one g of each metal at 25°C, what is the expected result? A) The copper will reach a higher temperature B) The silver will reach a higher temperature C) The two samples will reach the same temperature D) The copper will reach a temperature lower than 25°C E) The silver will soften
answer
The silver will reach a higher temperature
question
Which of the following quantities is NOT required to calculate the amount of heat energy required to heat water from 25°C to 55°C? A) the mass of the water sample B) the initial temperature C) the final temperature D) the specific heat of water E) the heat of vaporization for water
answer
the heat of vaporization of water
question
Raising the temperature of 10.0 g of water from 10.0°C to 20.0°C requires 100.0 cal of energy, while raising the temperature of 10.0 g of aluminum from 10.0°C to 20.0°C requires 22 cal. More calories are required to heat the water because A) water is a liquid and aluminum is a solid at 10.0°C B) ten grams of water occupies a larger volume than 10.0 g of aluminum C) water has a greater potential energy than aluminum D) water has a larger specific heat than aluminum E) 10.0°C is closer to the melting point of water than to the melting point of aluminum.
answer
water has a larger specific heat than aluminum
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The number of calories needed to raise the temperature of 32 g of water from 12°C to 54°C is A) 384 cal B) 1.3 cal C) 1300 cal D) 1700 cal E) 0.76 cal
answer
1300 cal
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Which of the following is a property of a solid? A) It takes the shape of the container B) It fills the volume of the container C) The particles move at a rapid rate D) The interactions between its particles are very week E) The particles have fixed positions and are very close together
answer
The particles have fixed positions and are very close together
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In a gas, the distance between the particles is
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very large relative to the size of the molecules
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Which of the following is a physical property of both liquids and gases?
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has randomly arranged particles
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Which of the following properties describes a liquid?
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particles are close together and move randomly
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If the heat of fusion for water is 80 cal/g, how many calories are needed to melt 45.0 g of ice at 0°C? A) 3.6 cal B) 3.6 × 10^3 cal C) 1.8 cal D) 80 cal E) 0.56 cal
answer
3.6 × 10^3 cal
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The formation of a gas resulting from the escape of high-energy particles from the surface of a liquid is known as
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evaporation
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When a solid is converted directly to a gas, the change of state is called
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sublimation
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The heat of fusion for water is 80 cal/g. How many calories of heat are released when 20.0 g of water at 0°C is frozen to ice? A) 600 cal B) 1600 cal C) 2000 cal D) 2200 cal E) 0 cal
answer
1600 cal
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The heat of fusion for water is 80 cal/g. How many calories of heat are needed to melt a 35 g ice cube that has a temperature of 0°C? A) 2300 cal B) 1600 cal C) 2800 cal D) 540 cal E) 0 cal
answer
2800 cal
question
The heat of vaporization for water is 540 cal/g. How many kilocalories are needed to change 22 g of liquid water to steam at 100°C? A) 540 kcal B) 12 kcal C) 12000 kcal D) 25 kcal E) 1.8kcal
answer
12 kcal
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If the heat of vaporization for water is 540 cal/g, how many calories are released when 5.00 g of steam is converted to liquid at 100°C? A) 540 kcal B) 5.0 kcal C) 110 kcal D) 2.7 kcal E) 5.4 kcal
answer
2.7 kcal
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Which of the following does NOT involve a change of state? A) melting ice B) freezing water C) vaporization of alcohol D) sublimation of dry ice E) pouring water into a vacuum-insulated bottle
answer
pouring water into a vacuum-insulated bottle
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True/False As heat is removed from a solid, its temperature decreases.
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True
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True/False Water vapor is a gas
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True
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True/False When liquid is boiling, its temperature does not change.
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True
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True/False Steam at 100°C holds the same of amount of heat as water at 100°C.
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False
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True/False The temperature at which water melts and freezes is the same.
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True
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True/False Water freezes at 100°C.
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False
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True/False The heat of fusion of water is larger than the heat of vaporization.
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False
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True/False Carbohydrates and proteins have the same caloric value per gram.
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True
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True/False Condensation occurs when a liquid is converted to a solid.
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False
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Helium is a(n) A) compound B) heterogeneous mixture C) element D) homogenerous mixture E) electron
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element
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Air is a(n) A) compound B) heterogeneous mixture C) element D) homogeneous mixture E) none of the above
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homogeneous mixture
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Coins in a piggy bank is a(n) A) compound B) heterogeneous mixture C) element D) homogenerous mixture E) none of the above
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heterogenous mixture.
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Gold in a ring is a(n) A) compound B) heterogeneous mixture C) element D) homogenerous mixture E) none of the above
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element
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The primary substances of which all other things are composed are A) molecules B) compounds C) elements D) electrons E) protons
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elements
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Au is the symbol for A) gold B) silver C) argon D) aluminum E) sodium
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gold
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Select the correct symbol for the element named. Aluminum A) Al B) Am C) Au D) Sn E) Ag
answer
Al
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Select the correct symbol for the element named. Iron A) Ir B) Fs C) Fe D) In E) FE
answer
Fe
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Select the correct symbol for the element named. Sodium A) So B) Na C) No D) Sm E) Au
answer
Na
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Select the correct symbol for the element named. Mercury A) Mr B) Na C) Au D) Hg E) Au
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Hg
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Potassium A) P B) Po C) Pt D) K E) Ko
answer
K
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Which of the following is a characteristic of the modern periodic table? A) A group is a horizontal row on the periodic table. B) A period is a column on the periodic table. C) The elements in each group have similar chemical properties D) The B groups contain the representative elements E) The A groups contain the transition elements
answer
The elements in each group have similar chemical properties.
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Which of the following is not a correct name, symbol combination? A) beryllium, Be B) magnesium, Mg C) iron, I D) manganese, Mn E) silicon, Si
answer
C) iron, I
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Mg is a member of which family? A) noble gases B) halogens C) alkaline earth metals D) alkali metals E) none of the above
answer
C) alkaline earth metals
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Ions are formed when atoms A) gain or lose protons B) gain or lose electrons C) gain or lose neutrons D) Each of these results in ion formation E) None of these results in ion formation
answer
B) gain or lose electrons
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How many electrons are in Br-? A) 4 B) 7 C) 34 D) 36 E) none of the above
answer
D) 36
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Isotopes are: A) atoms of the same element that have different number of neutrons. B) atoms of the same element that have different number of protons. C) atoms of the same element that have different number of electrons. D) atoms of the same element that have the same number of neutrons. E) none of the above
answer
A) atoms of the same element that have different number of neutrons.
question
A fictional element has two isotopes and an atomic mass of 87.08 amu. If the first isotope is 86 amu and the second isotope has a mass of 90 amu. Which isotope has the greatest natural abundance? A) 86 amu B) 90 amu C) There are equal amounts. D) Not enough information provided. E) none of the above
answer
A) 86 amu
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How many oxygen atoms are in the formula Al?(CO?)?? A) 3 B) 9 C) 1 D) 6 E) none of the above
answer
B) 9
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Which of the following elements has only 12 protons? A) C B) Zn C) Mg D) O E) none of the above
answer
C) Mg
question
Complete the following: Element: (a) Symbol: ³?Cl Protons: (b) Neutrons: (c) Electrons: (d) Mass #: (e)
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a) chlorine b) 17 c) 19 d) 17 e) 36
question
Complete the following: Element: (a) Symbol: (b) Protons: 30 Neutrons: (c) Electrons: (d) Mass #: 65
answer
a) zinc b) ??Zn c) 35 d) 30
question
Boron has two naturally occurring isotopes ¹?B and ¹¹B. What is the percent abundance of each if the atomic weight of Boron in nature is 10.81 amu. The atomic mass of ¹?B = 10.0129 amu and the atomic mass of ¹¹B=11.0093 amu. Make sure to use correct significant figures. For credit you must show comprehensible work.
answer
atomic mass = fraction of isotope 1 × mass of isotope 1 (+) fraction of isotope 2 × mass of isotope 2 atomic mass B= 10.81 amu atomic mass 10B =10.0129 amu atomic mass 11B= 11.0093 amu %10B = x %11B = 1-x 10.81amu = (x)(10.0129amu)+ (1? x)(11.0093amu) 10.81amu = 11.0093amu ? 0.9964xamu .9964xamu = 0.20amu x = .20 20.% ¹?B and 80.%¹¹B
question
What are the names of the following elements: Mo Mg Ag Sn
answer
Mo = molybdenum Mg = magnesium Ag = Silver Sn = tin
question
Predict the most likely ion formed by: Br Mg Ca Al
answer
Br? Mg²? Al³? Ca²?
question
All of the following statements about different elements are true EXCEPT: A) Barium is an alkaline earth metal. B) Manganese is a transition metal. C) Sulfur is considered a metalloid. D) Krypton is one of the noble gases. E) Iodine is a halogen.
answer
C) Sulfur is considered a metalloid.
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When an atom gains an electron, the resulting particle is called A) a proton B) an anion C) a cation D) an isotope E) none of the above
answer
B) an anion
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Which of the following elements is a noble gas? A) chlorine B) nitrogen C) bromine D) oxygen E) argon
answer
E) argon
question
Identify the noble gas in the following list: A) chlorine B) helium C) oxygen D) gold E) nitrogen
answer
B) helium
question
The number of electrons in the outer shell of a neutral atom of Boron (atomic number 5) is: A) 3 B) 5 C) 8 D) 2 E) 10
answer
A) 3
question
Which of the following is NOT true for atoms ¹³N, ¹?N and ¹?N? A) They all have the same atomic mass B) They all have the same mass number C) They all have 7 electrons D) They are isotopes E) They all have 7 protons
answer
B) They all have the same mass number
question
Consider a neutral atom with 30 protons and 34 neutrons. The number of electrons in this atom is: A) 94 B) 32 C) 30 D) 34 E) 64
answer
C) 30
question
How many protons are in an isotope of sodium with a mass number of 25? A) 14 B) 11 C) 15 D) 32 E) 35
answer
B) 11
question
Which of the following gives the correct number of protons, neutrons and electrons in a neutral atom of ¹¹?Sn? A) 118 protons, 118 neutrons, 50 electrons B) 118 protons, 50 neutrons, 118 electrons C) 50 protons, 68 neutrons, 50 electrons D) 50 protons, 50 neutrons, 50 electrons E) 68 protons, 68 neutrons, 50 electrons
answer
C) 50 protons, 68 neutrons, 50 electrons
question
Which element would have physical and chemical properties similar to chlorine? A) S B) P C) O D) Br E) Ar
answer
D) Br
question
Which of the following is a characteristic of the modern periodic table? A) A period is a column on the periodic table B) The elements in each group have similar chemical properties C) A group is a horizontal row on the periodic table D) The A groups contain the transition elements E) The B groups contain the representative elements
answer
B) The elements in each group have similar chemical properties
question
What is the symbol of the element in Period 4 and Group 2? A) Mg B) Ca C) Si D) C E) Be
answer
B) Ca
question
What is the mass number of an atom of potassium that has 20 neutrons? A) 35 B) 39 C) 19 D) 59 E) 15
answer
B) 39
question
An isotope has a mass number of 74 and contains 42 neutrons. What is the group number of that element? A) 2 B) 13 C) 14 D) 3
answer
C) 14
question
Two atoms always represent the same element if they have A) the same number of neutrons. B) the same number of protons. C) the same mass number. D) the same number of shells.
answer
B) the same number of protons.
question
An atom of ³?Cl weighs 34.96885 amu. Its isotopic abundance is 75.77%. An atom of ³?Cl weighs 36.96590 amu. Its isotopic abundance is 24.23%. Use these data to calculate the atomic mass of chlorine. A) 35.97 amu B) 35.45 amu C) 34 amu D) 36 amu
answer
B) 35.45 amu
question
What is the name of the group that includes the elements magnesium, calcium, and barium? A) halogens B) alkali metals C) noble gases D) alkaline earth metals
answer
D) alkaline earth metals
question
Which of these elements is/are in the second period? chlorine, iron, silver, sodium, oxygen, helium, magnesium, beryllium A) beryllium and oxygen B) sodium, magnesium, and chlorine C) helium D) beryllium and magnesium
answer
A) beryllium and oxygen
question
An element that contains 16 protons and 16 neutrons has the chemical symbol A) ¹?S B) ³²Ge C) ³²S D) ¹?Ge
answer
C) ³²S
question
How many protons and how many electrons are in an oxygen ion that has a -2 charge? A) There are eight electrons and eight protons in an O2- ion. B) There are eight electrons and six protons in an O2- ion. C) There are ten electrons and eight protons in an O2- ion. D) There are eight electrons and ten protons in an O2- ion.
answer
C) There are ten electrons and eight protons in an O2- ion.
question
Two atoms are isotopes if they have the same A) number of neutrons and a different number of electrons. B) number of neutrons and a different number of protons. C) number of protons and electrons. D) the same number of protons and a different number of neutrons.
answer
D) the same number of protons and a different number of neutrons.
question
An atom of ¹?O weighs 15.994915 amu. Its isotopic abundance is 99.757%. An atom of ¹?O weighs 16.999132 amu. Its isotopic abundance is 0.0378%. An atom of ¹?O weighs 17.999160 amu. Its isotopic abundance is 0.2050%. Use these data to calculate the atomic mass of oxygen. A) 15.999 amu B) 16.998 amu C) 17 amu D) 16.00 amu
answer
A) 15.999 amu
question
What is the name of the group that includes the elements chlorine, bromine, and iodine? A) alkaline earth metals B) noble gases C) alkali metals D) halogens
answer
D) halogens
question
Which statement is true? A) Rutherford demonstrated that cathode rays are composed of charged particles. B) Dalton believed that atoms were indivisible. C) Thomson demonstrated that the majority of the mass of the atom was combined into a nucleus. D) All of the above are true statements.
answer
B) Dalton believed that atoms were indivisible.
question
Which of these elements is/are in the third period? chlorine, hydrogen, boron, sodium, oxygen, helium, magnesium, beryllium A) chlorine, sodium, and magnesium B) sodium and hydrogen C) boron, oxygen, and helium D) beryllium and boron
answer
A) chlorine, sodium, and magnesium
question
An element that contains 18 protons and 22 neutrons has the chemical symbol A) ??Ar B) ¹?S C) ¹?Zr D) ??Zr
answer
A) ??Ar
question
What is the most common charge for aluminum and for bromine? A) Aluminum will have a -5 charge and bromine will have a +7 charge. B) Aluminum will have a +3 charge and bromine will have a -1 charge. C) Aluminum will have a +5 charge and bromine will have a -1 charge. D) Aluminum will have a -3 charge and bromine will have a -1 charge.
answer
C) Aluminum will have a +5 charge and bromine will have a -1 charge.
question
What is the simplest binary compound that can form between strontium and oxygen? A) SrO B) SrO? C) Sr?O D) Sr?O?
answer
A) SrO
question
Which of these is the formula for carbonate? A) CO?³? B) CO?? C) CO?²? D) CO??
answer
C) CO?²?
question
Which of these elements will require a Roman numeral when naming ionic compounds formed from it? Cr, Ca, C, Co, Cs A) Cr and Co B) Ca, C, and Cs C) Ca and Co D) Cr, Ca, and Co
answer
A) Cr and Co
question
What is the name of Cu(ClO?)?? A) copper(II) chlorite B) copper chloride C) copper(II) chlorate D) copper chlorine dioxide
answer
A) copper(II) chlorite
question
What is the name of XeF?? A) xenon difluoride B) monoxenon difluoride C) xenon fluoride D) xenon difluorate
answer
A) xenon difluoride
question
What is the name of the acid that forms from the polyatomic ion NO?? and from the polyatomic ion Br?? A) nitrous acid and hydrobromic acid B) nitric acid and hydrobromic acid C) nitric acid and hydrobromide acid D) nitrous acid and hydrogen bromide acid
answer
B) nitric acid and hydrobromic acid
question
Which of the following statements about atoms is FALSE? A) Atoms compose all matter. B) Atoms are responsible for the sensation of smell. C) Atoms are the basic building block of nature. D) An atom is the smallest identifiable unit of an element. E) All of the above statements are true.
answer
E) All of the above statements are true.
question
Which statement below accurately describes the contributions of Dalton? A) ancient Greek philosopher who proposed that matter was continuous B) created the modern periodic table C) proposed the modern Atomic Theory D) discovered the existence of electrons E) none of the above
answer
C) proposed the modern Atomic Theory
question
Which of the following is not part of Dalton's Atomic Theory? A) Each element is composed of tiny indestructible particles called atoms. B) All atoms of a given element have the same mass and other properties that distinguish them from the atoms of other elements. C) Atoms combine in simple, whole-number ratios to form compounds. D) Most of the atom's mass and all of its positive charge is contained in a small core called the nucleus. E) All of the above are part of the atomic theory.
answer
D) Most of the atom's mass and all of its positive charge is contained in a small core called the nucleus.
question
Which statement below accurately describes the contributions of Thomson? A) ancient Greek philosopher who proposed that matter was continuous B) created the modern periodic table C) proposed the modern Atomic Theory D) discovered the existence of electrons E) none of the above
answer
D) discovered the existence of electrons
question
Which of the statements about the discovery of electrons is FALSE? A) Because atoms are neutral, the existence of a negatively charged particle implied there must be a positively charged component of an atom. B) Thomson proposed that electrons were small particles held within a positively charged sphere. C) Rutherford proved the plum-pudding model correct. D) The negatively charged electron is located outside the nucleus. E) All of the above statements are true.
answer
C) Rutherford proved the plum-pudding model correct.
question
Which statement below is NOT consistent with the nuclear theory of the atom as proposed by Rutherford? A) Most of the atom's mass and all of its positive charge is contained in a small core called the nucleus. B) Electrical charge is a fundamental property of protons and electrons in which like charges repel and opposite charges attract. C) Most of the volume of the atom is empty space occupied by tiny, negatively charged electrons. D) There are as many electrons outside the nucleus as there are protons inside the nucleus in a neutral atom. E) All of the above statements are consistent.
answer
B) Electrical charge is a fundamental property of protons and electrons in which like charges repel and opposite charges attract.
question
Which statement reflects the results of Rutherford's gold foil experiments? A) Most all of the alpha particles were deflected back in the direction from which they came. B) Many alpha particles sputtered gold atoms off of the surface of the foil. C) Many alpha particles were deflected while passing through the foil. D) Most all of the alpha particles passed directly through the foil. E) none of the above
answer
D) Most all of the alpha particles passed directly through the foil.
question
The atomic mass unit is defined as: A) the mass of the hydrogen atom containing only one proton. B) the mass of electrons found in a carbon atom containing six protons and neutrons. C) 1/12 the mass of a carbon atom containing six protons and six neutrons. D) 1/14 the mass of a nitrogen atom containing 7 protons and 7 neutrons. E) none of the above
answer
C) 1/12 the mass of a carbon atom containing six protons and six neutrons.
question
Which of the following statements about the nature of electrical charge is FALSE? A) Electrical charge is a fundamental property of protons and electrons. B) Positive and negative electrical charges attract each other. C) Positive-positive or negative-negative charges repel each other. D) Positive and negative charges cancel each other so that a proton and electron, when paired, are charge neutral. E) All of the above statements are true.
answer
E) All of the above statements are true.
question
Which of the following subatomic particles has a mass of 1.67 x 10?27 kg ? A) electrons only B) protons only C) neutrons only D) protons and neutrons E) none of the above
answer
D) protons and neutrons
question
Metals are located where on the periodic table? A) left side B) right side C) middle D) zig-zag diagonal line E) none of the above
answer
A) left side
question
Nonmetals are located where on the periodic table? A) left side B) right side C) middle D) zig-zag diagonal line E) none of the above
answer
B) right side
question
Metalloids are located where on the periodic table? A) left side B) right side C) middle D) zig-zag diagonal line E) none of the above
answer
D) zig-zag diagonal line
question
Group 1A elements are also called: A) noble gases. B) halogens. C) alkaline earth metals. D) alkali metals. E) none of the above
answer
D) alkali metals.
question
Group 7A elements are also called: A) noble gases. B) halogens. C) alkaline earth metals. D) alkali metals. E) none of the above
answer
B) halogens.
question
Group 8A elements are also called: A) noble gases. B) halogens. C) alkaline earth metals. D) alkali metals. E) none of the above
answer
A) noble gases.
question
Group 2A elements are also called: A) noble gases. B) halogens. C) alkaline earth metals. D) alkali metals. E) none of the above
answer
C) alkaline earth metals.
question
Identify the element that is a nonmetal, a gas, and has an elemental symbol that starts with the letter "A". A) Ac B) Ar C) Au D) Al E) none of the above
answer
B) Ar
question
What is the term for the amount of energy required to raise one gram of water one degree on the Celsius scale? A) Calorie B) calorie C) joule D) kilocalorie E) none of the above
answer
B) calorie
question
According to the metric system, 1 Gg = ________ g. A) 1 x 10¹² B) 1 x 10? C) 1 x 10? D) 1 x 10³ E) none of the above
answer
B) 1 x 10?
question
If a 250 mL beaker weighs 95.4 g, what is the mass in kilograms? A) 0.0954 kg B) 0.954 kg C) 95.4 kg D) 95,400 kg E) none of the above
answer
A) 0.0954 kg
question
If Earth is 1.50 x 108 km from the Sun, what is the distance in Gm? A) 1.50 x 10?¹ Gm B) 1.50 x 10² Gm C) 1.50 x 10? Gm D) 1.50 x 10²? Gm E) none of the above
answer
B) 1.50 x 10² Gm
question
If a copper wire is 195 cm long, what is the length in inches? A) 43.0 in. B) 76.8 in. C) 195 in. D) 495 in. E) 885 in.
answer
B) 76.8 in.
question
If a water bottle contains 375 mL, what is the volume in quarts? A) 0.396 qt B) 0.826 qt C) 1.21 qt D) 2.52 qt E) 355,000 qt
answer
A) 0.396 qt
question
A sample of lime gold is: 14.0 g gold, 7.0g silver, and 3.0 g copper. What is the percent copper in the sample? A) 3.0% B) 13% C) 29% D) 58% E) 67%
answer
B) 13%
question
If a steel solid has a volume of 46.5 cm3, what is the volume in cubic inches? A) 2.84 in.³ B) 7.21 in.³ C) 18.3 in.³ D) 118 in.³ E) 762 in.³
answer
A) 2.84 in.³
question
The measurement 0.000 0043 m, expressed correctly using scientific notation, is A) 4.3 × 10?? m. B) 4.3 × 10?? m. C) 4.3 × 10? m. D) 0.43 × 10?? m. E) 4.3 m.
answer
B) 4.3 × 10?? m.
question
How many significant figures are in the number 0.00208? A) six B) two C) three D) four E) five
answer
C) three
question
When 2610 + 11.7 + 0.22 are added, the answer to the correct number of decimal places is __________. A) 2621.92 B) 2621.9 C) 2621 D) 2620 E) 2600
answer
D) 2620
question
How many calories are required to increase the temperature of 13 g of alcohol from 11 °C to 23 °C? The specific heat of alcohol is 0.588 cal/g °C. A) 83 cal B) 0.63 cal C) 92 cal D) 0.54 cal E) 170 cal
answer
C) 92 cal
question
What is a compound? A) the simplest form of a substance B) a combination only of 3 elements C) a combination of 2 or more elements D) a place where people are held
answer
C) a combination of 2 or more elements
question
What is a mixture? A) a combination of elements to make a new substance B) a chemically combined substance C) a combination of substances where new substances are formed through a reaction D) a combination of substances in which the atoms of the substance do not chemically combine
answer
D) a combination of substances in which the atoms of the substance do not chemically combine
question
What is the simplest form that cannot be broken down to anything simpler? A) element B) solution C) compound
answer
A) element
question
A substance that contains only one type of atom is a(n) A) compound B) element C) heterogeneous mixture D) homogeneous mixture
answer
B) element
question
Which of these is a pure substance? A) bread B) table salt C) garden soil D) sea water
answer
B) table salt
question
A combination of particles of one or more substance that are distributed uniformly throughout another substance is a/an A) Mixture B) Substance C) Solution
answer
C) Solution
question
Can a mixture be separated? A) No B) Yes C) Only sometimes
answer
B) Yes
question
Which of the following is a homogeneous mixture? A) salt B) water C) sugar D) a sugar-water solution
answer
D) a sugar-water solution
question
This type of mixture contains two or more substances that are visibly distinguishable. A) homogeneous B) heterogeneous C) solution D) colloid
answer
B) heterogeneous
question
KoolAid an example of a ___________. A) solution B) mixture C) gas D) plasma
answer
A) solution
question
If they are not the same throughout, they are called... A) Homogeneous B) Heterogeneous C) Compounds D) Pure substance
answer
B) Heterogeneous
question
Can only be separated by chemical means. A) element B) mixture C) compound
answer
C) compound
question
It is a pure substance containing two or more different kinds of atoms. A) element B) mixture C) compound
answer
C) compound
question
It is considered a solution. A) Heterogeneous B) Homogeneous C) Pure substance
answer
B) Homogeneous
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