Chemical Principles – Flashcards
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Unlock answersA classroom contains 24 chairs.
a. exact number
b. inexact number 
a. exact number 
There are 60 seconds in a minute.
a. exact number
b. inexact number 
a. exact number 
A bag of cherries weighs 4.1 pounds.
a. exact number
b. inexact number 
b. inexact number 
A newspaper article contains 421 words.
a. exact number
b. inexact number 
a. exact number 
With a high grade measuring device, the volume of a liquid is determined to be 6.321 L. Measurements are taken with lessergrade equipement. How does it compare in terms of accuracy and precision. Test 1 Test 2 Test 3 Test 4 6.35 L 6.31 L 6.38 L 6.32 L
a. accurate and precise b. inaccurate but precise c. Inaccurate and inprecise 
c. inaccurate and inprecise 
With a high grade measuring device, the volume of a liquid is determined to be 6.321 L. Measurements are taken with lessergrade equipement. How does it compare in terms of accuracy and precision. Test 1 Test 2 Test 3 Test 4 6.31 L 6.32 L 6.33 L 6.32 L
a. accurate and precise b. inaccurate but precise c. Inaccurate and inprecise 
a. accurate and precise 
With a high grade measuring device, the volume of a liquid is determined to be 6.321 L. Measurements are taken with lessergrade equipement. How does it compare in terms of accuracy and precision. Test 1 Test 2 Test 3 Test 4 6.36 L 6.35 L 6.35 L 6.36 L
a. accurate and precise b. inaccurate but precise c. Inaccurate and inprecise 
b. inaccurate but precise 
What is the difference between the times 3.3 seconds and 3.30 seconds?
a. There is no difference b. 3.3 sec is ±0.1 and 3.30 sec is ±0.01accurate c. 3.3sec is ±0.01 and 3.30 sce ±0.001accurate d. 3.3 sec is ±0.001 and 3.30 sec is ±0.0001accurate

b. 3.3 sec is ±0.1 and 3.30 sec is ±0.01accurate 
Determine the number of significant figures in: 0.00043
a. one b. two c. four d. five 
b. two 
Determine the number of significant figures in: 0.0220022
a. four b. six c. seven d. eight 
b. six 
Determine the number of significant figures in: 0.30303030
a. six b. seven c. eight d. nine 
c. eight
The last zero in a signifcant figure because it occurs after a desimal. 
Determine the number of significant figures in: 0.03030303
a. six b. seven c. eight d. nine 
b. seven

True or false, these numbers conatin the same amount of signifcant figures:
11.01 and 11.00
a. True b. False 
a. True
The zeroes after a desimal are signifcant 
True or false, these numbers contain the same amount of signifcant figures:
2002 and 2020
a. True b. False 
b. False 
True or false, these numbers conatin the same amount of signifcant figures:
0.05700 and 0.05070
a. True b. False 
a. True 
True or false, these numbers conatin the same amount of signifcant figures:
0.000066 and 660000
a. True b. False 
a. True 
Round off to the number of significant figures indicated:
0.350763 (three)
a. 0.350 b. 0.351 c. 0.35 d. 0.3508 
b. 0.351 
Round off to the number of significant figures indicated:
653.899 (four)
a. 653.8 b. 653.9 c. 654.0 d. 653.90 
b. 653.9 
Round off to the number of significant figures indicated:
22.55555 (five)
a. 22.555 b. 22.556 c. 22.560 d. 22.557 
b. 22.556 
Round off to the number of significant figures indicated:
0.277654 (four)
a. 0.2776 b. 0.2777 c. 0.2778 d. 0.2775 
a. 0.2776 
Rewrite so the number only contains two significant figures:
0.123
a. 0.1 b. 0.12 c. 0.13 d. 0.123 
b. 0.12 
Rewrite so the number only contains two significant figures:
123000
a. 123000 b. 120000 c. 100000 d. 12 
b. 120000 
Rewrite so the number only contains two significant figures:
12.3
a. 12.3 b. 12.0 c. 12 d. 12.1 
c. 12 
Rewrite so the number only contains two significant figures:
0.000123
a. 0.0001 b. 0.00 c. 0.00012 d. 0.000123 
c. 0.00012 
Indicate the number of signifcant figures:
4.5 x 4.05 x 4.50
a. one b. two c. three d. four 
b. two 
Indicate the number of signifcant figures:
0.100 x 0.001 x 0.010
a. one b. two c. three d. four 
a. one 
Indicate the number of signifcant figures:
655000 6.5500
a. one b. two c. three d. four 
c. three 
Indicate the number of signifcant figures:
6.00 33.000
a. one b. two c. three d. four 
c. three

Indicate the uncertainy of the problem:
12.1 + 23.1 + 127.01
a. ±0.1 b. ±0.01 c. ±1 d. ±0.001 
a. ±0.1 (tenths) 
±Indicate the uncertainy of the problem:
43.65  23.7
a. ±0.1 b. ±0.01 c. ±1 d. ±0.001 
a. ±0.1 (tenths) 
Indicate the uncertainy of the problem:
23.6 + 33 + 17.21
a. ±0.1 b. ±0.01 c. ±1 d. ±0.001 
c. ±1 
Indicate the uncertainy of the problem:
4650 + 25 + 200
a. ±0.1 b. ±10 c. ±1 d. ±100 
d. ±100 (hundreds) 
Determine if the exponent will be positive, negative, or zero when expressed in scientific notation. 0.0230 a. Positive b. Negative c. Zero

a. negative 
Determine if the exponent will be positive, negative, or zero when expressed in scientific notation. 321.7 a. positive b. negative c. zero 
a. positive 
Determine if the exponent will be positive, negative, or zero when expressed in scientific notation. 6.87 a. positive b. negative c. zero 
c. zero 
Determine if the exponent will be positive, negative, or zero when expressed in scientific notation. 63002 a. positive b. negative c. zero 
a. positve 
10^5 x 10^3
a. 10^15 b. 10^8 c. 10^5 d. 10^2

a. 10^8 
10^5 x 10^3
a. 10^15 b. 10^8 c. 10^8 d. 10^2 
b.10^8

10^5 x 10^3
a. 10^15 b. 10^8 c. 10^2 d. 10^2 
c. 10^2 
10^5 x 10^3
a. 10^8 b. 10^8 c. 10^2 d. 10^2 
d. 10^2 
Solve: (3.245 x10^3) + (1.17 x 10^3)
a. 4.415 x10^3 b. c. d. 4.42 x10^3 
d. 4.42 x10^3 
Solve: (9.870 x10^2)  (5.7 x10^3)
a. 9.3 x10^2 b. c. 9.30 x10^2 d. 
c. 9.30 x10^2 
Solve: (9.356 x10^5) + (3.27 x10^5)
a. 9.68 x10^5 b. c. d. 
a. 9.68 x10^5 
Solve: (2.030 x10^4)  (1.111 x10^3)
a. b. 1.92 x10^4 c. 1.919 x10^4 d. 
c. 1.919 x10^4 
Tera = T 
10^12 
Giga =G 
10^9 
Mega = M 
10^6 
Kilo =k 
10^3 
Hecto =h 
10^2 
Deca =da 
10^1 
Deci =d 
10^1 
Centi =c 
10^2 
Milli = m 
10^3 
Micro =µ 
10^6 
Nano =n 
10^9 
Pico =p 
10^12 
Area of a rectangle 
A= length x width 
Area of a circle 
Area =∏ x Radius^2 
Area of a Triange 
Area =½ x base x height 
Volume of Rectanglar Solid 
Volume = Length x width x height 
Volume of a Cylinder 
Volume = ∏ x radius^2 x height 
Volume of a Sphere 
Volume = 4/3 x ∏ x radius^3 
Conversion of Length
cm to in. 
2.540 cm 1 in. 
Conversion of Mass
g to lb 
453.6 g 1 lb 
Conversion of Volume
L to qt 
0.9463 L 1 qt 
Use the appropraite metric prefix to replace scientific notation:
6.8 x10^9 m 
6.8 nm 
Use the appropraite metric prefix to replace scientific notation:
3.2 x10^6 m 
3.2 µm 
Use the appropraite metric prefix to replace scientific notation:
7.23 x10^3 L 
7.23 kL 
Use the appropraite metric prefix to replace scientific notation:
6.5 x10^9 g 
6.5 Gg 
Convert: 25mg to g 
0.025mg 
Convert: 323 km to m 
323000 m 
Convert: 25.0 L to dL 
250 dL 
Convert: 0.010 g to pg 
? 1.0 x10^9 pg ? 
Convert: 244 lb to kg 
111 kg
244 lb x 453.6 g x 1 kg = 110.6784 kg 1 lb 10^3 g 
Convert: 0.250 tons to g 
227000 g
0.250 ton x 2000 lb x 453.6 g = 226800 g 1 ton 1 lb 
Convert: 24.2 in to mm 
615 mm
24.2 in x 2.540 cm x 10^2 mm = 1 in 1 cm 
Convert: 375 cm^3 to ft^3 
1.32 x10^2 ft^3
375 cm^3 x ( 1 in )^3 x ( 1 ft )^3 = (2.540 cm)^3 x (12 in)^3
375 x 1^3 x 1 ^3 = 0.013243 2.54^3 12^3 
All molecules present are triatomic; two substances are present; one phase is present.
a. element b. compound c. homogeneous mixture d. heterogeneous mixture 
d. heterogeneous mixture
Heterogeneous (1 phase) mixture (2 substances)

All molecules present are heteroatomic; one substance is present; two phases are present.
a. element b. compound c. homogeneous mixture d. heterogeneous mixture 
b. compound
One substance, heteroatomic 
All molecules present are identical and homoatomic; one phase is present.
a. element b. compound c. homogeneous mixture d. heterogeneous mixture 
a. element
one substance of identical homoatomic molecules 
Both homoatomic and heteroatomic molecules are present; one phase is present.
a. element b. compound c. homogeneous mixture d. heterogeneous mixture 
c. homogeneous mixture
Homogeneos (one phase) mixture (2 types of molecules) 
One kind of homoatomic molecules is present; one phase is present.
a. element b. compound c. homogeneous mixture d. heterogeneous mixture 
a. element 
All molecules present are diatomic; two substances are present; one phase is present.
a. element b. compound c. homogeneous mixture d. heterogeneous mixture 
b. homogeneous mixture
homogeneous (one phase) mixture (two phases) 
Two kinds of heteroatomic molecules are present; two phases present
a. element b. compound c. homogeneous mixture d. heterogeneous mixture 
d. heterogeneous mixture
Heterogeneous (two phases) mixture (two substances) 
All molecules present are idenetical, triatomic, and heteroatomic; one phase is present.
a. element b. compound c. homogeneous mixture d. heterogeneous mixture 
d. compound 
What does the atomic number indicate?
a. number of protons b. number of neutrons c. number of electrons d. number of protons and electrons 
a. number of protons
(a neutral element would have an equal number of protons and eletrons) 
What does the mass number indicate?
a. number of protons b. number of neutrons c. number of neutrons and protons d. number of protons and electrons

c. number of neutrons and protons 
Three isotopes exist for argon, element 18. One isotope has an isotopic mass of 35.967amu and a % abundance of 0.337. A 2nd isotope has an isotopic mass of 37.963 amu and a % adundance 0f 0.063. The 3rd isotope has an isotopic mass of 39.962 amu. What are the mass numbers for the 3 isotopes? 
1st: 36 (35.967 amu)
2nd: 38 (37.963 amu)
3rd: 40 (39.962 amu) 
Three isotopes exist for argon, element 18. One isotope has an isotopic mass of 35.967amu and a % abundance of 0.337. A 2nd isotope has an isotopic mass of 37.963 amu and a % adundance 0f 0.063. The 3rd isotope has an isotopic mass of 39.962 amu. What is the % abundance for the 3rd isotope? 
99.600%
(100.000 0.337 0.063)% = 99.600%

Atoms are the basic building blocks for all kinds of matter
a. true b. false 
a. true 
Different types of atmos exist.
a. true b. false 
a. true 
All atoms of a give type are identical
a. true b. false 
b. false 
NaClO(2)
a. compound b. element 
a. compound 
CO
a. compound b. element 
a. compound 
S(8)
a. compound b. element 
b. element 
Al
a. compound b. element 
b. element 
posses a negative charge
a. electron b. proton c. neutron d. proton and neutron 
a. electron 
Has mass slightly less than a neutron
a. electron b. proton c. neutron d. proton and neutron 
b. proton 
Can be called a nucleon
a. electron b. proton c. neutron d. proton and neutron 
d. proton and neutron 
heaviest of the three particles
a. electron b. proton c. neutron d. proton and neutron 
c. neutron 
What element has: 5 protons, 5 electrons, and 6 neutrons?
a. 9/4 Be b. 12/6 C c. 1/1 H d. 11/5B 
d. 11/5 B 
Compare: 40/20 CA and 41/19 K
a. same number of subatomic particles (60) b. same number of neutrons (20) c. same number of subatmoc particles (61) d. same number of neutrons (21) 
a. same number of subatomic particles (60) 
Compare: 30/14 Si and 32/16 S
a. same number of subatomic particles (16) b. same number of neutrons (16) c. same number of subatomic particles (48) d. same number of neutrons (18) 
b. same number of neutrons (16) 
Compare: 23/11 Na and 24/12 Mg
a. same number of subatomic particles (24) b. same number of neutrons (11) c. same number of subatmoc particles (34) d. same number of neutrons (12) 
d. same number of neutrons (12) 
24/12 X amd 26/12 Q
a. isotopes b. isobars c. neither 
a. isotopes 
71/31 X amd 71/32 Q
a. isotopes b. isobars c. neither 
b. isobars 
56/25 X amd 54/24 Q
a. isotopes b. isobars c. neither 
c. neither 
57/27 X amd 60/27 Q
a. isotopes b. isobars c. neither 
a. isotopes 
Calculate atomic mass of Titanium given: Ti46 = 7.93% (45.95263 amu) Ti47 = 7.28% (46.9518 amu) Ti48 = 73.94% (47.94795 amu) Ti49 = 5.51% (48.94787 amu) Ti50 = 5.34% (49.9448 amu) 
47.88 amu
0.0793 x 45.95263 = 3.644 0.0728 x 46.9518 = 3.418 0.7394 x 47.94795 = 35. 453 = 47.879 0.0551 x 48.94787 = 2. 697 0.0534 x 49.9448 = 2. 667 
In which of the following pairs of numbers does each member of the pair contain the same number of significant figures? a. 22.30 and 22.3 b. 314 and 3.14 c. 63,000 and 6,300 d. more than one correct reponse e. no correct reponse 
d. more than one correct reponse
both b. and c. contain the same number of signifcant figures b. (3) and c. (2) 
Which of the following statements concerning the significatn of zeros in measured numbers correct? a. leading zeros are alway significant b. confinined zeros are always significant c. trailing zeros are never significant d. more than one correct anwser e. no correct anwser 
b. confined zeros are alway significant 
In which of the following measured numbers are all of the zeros significant? a. 0.000003140 b. 3.0101 c. 360, 031, 010 d. more than one anwser is correct e. no correct response 
b. 3.0101 
In which o the following cases is the given number correctly rounded to three significant figures? a. 241,000 becomes 241 b. 0.3334 becomes 0.334 c. 42.357 becomes 42.3 d. more than one correct response e. no correct repsonse 
c. 42.257 becomes 42.3 
In which of the following pairs of numbers do the two members of the pair have the same uncertainty? a. 3.102 and 5.134 b. 0.20 and 0.200 c. 301,000 and 300,000 d. more than one correct answer e. no correct response 
a. 3.102 and 5.134

The calculator anwser obtained from 42.44 x 4.41 x 7.00 is 1013.0428. This anwser: a. is correct as written b. should be rounded to 1013 c. should be rounded to 1010 d. more than one correct response e. no correct response 
c. should be rounded to 1010 
The correct answer obtained from adding the measurements 8.1, 3.14, and 97.143 contains: a. 2 significant figures b. 3 significant figures c. 4 significant figures d. 5 significant figures e. no correct response 
a. 2 significant figures 
Which problem contains only 1 significant figure? a. 4.0 x (2.3 + 4.5) b. 3.0 x (3.7  3.4) c. 7.02 x (0.0001 + 0.011) d. more than one correct response e. no correct response 
c. 7.02 x (0.0001 + 0.011) 
Given that 7 is exact number and 0.13 is a measured number, for which of the following problems does the answer contian 3 significant figures? a. 7 x 0.13 b. 7/0.13 c. 7 + 0.13 d. more than one correct response e. no correct response 
e. no correct response
all responses only contain 2 significant figures 
In which of the following cases is the given number correctly converted to scientific notation? a. 321,000 becomes 3.21 x10^4 b. 0.00300 becomes 3 x10^3 c. 31.040 becomes 3.104 x10^1 d. more than one correct response e. no correct response 
? e. no correct reponse ?
a. is incorrect, b. and c. have incorrect significant figures 
In which of the following pairs of numbers do the two members have the same uncertainty? a. 4.80 x10^5 and 4.80 x10^6 b. 3.21 x10^4 and 3.2 x10^3 c. 3 x10^5 and 3.2211 x10^1 d. more than one correct response e. no correct response 
? d. 3 x10^5 and 3.2211 x10^1 ?
0.00003 0.32211 ±0.00001 
In which of the following pairs of number are the two numbers totally equivalent? a. 3200 and 3.200 x10^3 b. 0.20 and 2.0 x10^1 c. 4713.0 and 4.7130 x10^3 d. more than one correct response e. no correct response 
d. more than one correct response
all responses are totally equivalent 
Which of the following metric system prefixes is correctly pair with its mathematical meaning? a. milli and 10^2 b. micro and 10^6 c. giga and 10^9 d. more than one correct response e. no correct response 
c. micro and 10^6
a. milli (10^3) and 10^2 (centi) c. giga (10^9) and 10^9 (nano)

In which of the following sequences are the metric system prefixes listed in decreasing size? a. mega, giga, kilo b. nano, micro, milli c. pico, centi, deci d. more than one correct response e. no correct repsonse 
e. no correct response 