Chemical Principles – Flashcards

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question
 A classroom contains 24 chairs.   a. exact number b. inexact number
 a. exact number
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 There are 60 seconds in a minute.  a. exact number b. inexact number
 a. exact number
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 A bag of cherries weighs 4.1 pounds.  a. exact number b. inexact number
 b. inexact number
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 A newspaper article contains 421 words.  a. exact number b. inexact number
 a. exact number
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 With a high grade measuring device, the volume of a liquid is determined to be 6.321 L. Measurements are taken with lesser-grade 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 preciseb. inaccurate but precisec. Inaccurate and inprecise
 c. inaccurate and inprecise
question
 With a high grade measuring device, the volume of a liquid is determined to be 6.321 L. Measurements are taken with lesser-grade 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 preciseb. inaccurate but precisec. Inaccurate and inprecise
 a. accurate and precise
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 With a high grade measuring device, the volume of a liquid is determined to be 6.321 L. Measurements are taken with lesser-grade 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 preciseb. inaccurate but precisec. Inaccurate and inprecise
 b. inaccurate but precise
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 What is the difference between the times 3.3 seconds and 3.30 seconds?  a. There is no differenceb. 3.3 sec is ±0.1 and 3.30 sec is ±0.01accuratec. 3.3sec  is ±0.01 and 3.30 sce ±0.001accurated. 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
question
 Determine the number of significant figures in:0.00043 a. oneb. twoc. fourd. five
 b. two
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 Determine the number of significant figures in:0.0220022 a. fourb. sixc. sevend. eight
 b. six
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 Determine the number of significant figures in:0.30303030 a. sixb. sevenc. eightd. nine
 c. eight The last zero in a signifcant figure because it occurs after a desimal.
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 Determine the number of significant figures in:0.03030303 a. sixb. sevenc. eightd. nine
 b. seven
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 True or false, these numbers conatin the same amount of signifcant figures: 11.01 and 11.00 a. Trueb. False
 a. True  The zeroes after a desimal are signifcant
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 True or false, these numbers contain the same amount of signifcant figures: 2002 and 2020 a. Trueb. False
 b. False
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 True or false, these numbers conatin the same amount of signifcant figures: 0.05700 and 0.05070 a. Trueb. False
 a. True
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 True or false, these numbers conatin the same amount of signifcant figures: 0.000066 and 660000 a. Trueb. False
 a. True
question
 Round off to the number of significant figures indicated: 0.350763 (three) a. 0.350b. 0.351c. 0.35d. 0.3508
 b. 0.351
question
 Round off to the number of significant figures indicated: 653.899 (four) a. 653.8b. 653.9c. 654.0d. 653.90
 b. 653.9
question
 Round off to the number of significant figures indicated: 22.55555 (five) a. 22.555b. 22.556c. 22.560d. 22.557
 b. 22.556
question
 Round off to the number of significant figures indicated: 0.277654 (four) a. 0.2776b. 0.2777c. 0.2778d. 0.2775
 a. 0.2776
question
 Rewrite so the number only contains two significant figures: 0.123 a. 0.1b. 0.12c. 0.13d. 0.123
 b. 0.12
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 Rewrite so the number only contains two significant figures: 123000 a. 123000b. 120000c. 100000d. 12
 b. 120000
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 Rewrite so the number only contains two significant figures: 12.3 a. 12.3b. 12.0c. 12d. 12.1
 c. 12
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 Rewrite so the number only contains two significant figures: 0.000123 a. 0.0001b. 0.00c. 0.00012d. 0.000123
 c. 0.00012
question
 Indicate the number of signifcant figures: 4.5 x 4.05 x 4.50 a. oneb. twoc. threed. four
 b. two
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 Indicate the number of signifcant figures: 0.100 x 0.001 x 0.010 a. oneb. twoc. threed. four
 a. one
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 Indicate the number of signifcant figures: 6550006.5500 a. oneb. twoc. threed. four
 c. three
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 Indicate the number of signifcant figures: 6.0033.000 a. oneb. twoc. threed. four
 c. three
question
 Indicate the uncertainy of the problem: 12.1 + 23.1 + 127.01 a. ±0.1b. ±0.01c. ±1d. ±0.001
 a. ±0.1 (tenths)
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 ±Indicate the uncertainy of the problem: 43.65 - 23.7 a. ±0.1b. ±0.01c. ±1d. ±0.001
 a. ±0.1 (tenths)
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 Indicate the uncertainy of the problem: 23.6 + 33 + 17.21 a. ±0.1b. ±0.01c. ±1d. ±0.001
 c. ±1
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 Indicate the uncertainy of the problem: 4650 + 25 + 200 a. ±0.1b. ±10c. ±1d. ±100
 d. ±100 (hundreds)
question
 Determine if the exponent will be positive, negative, or zero when expressed in scientific notation.                            0.0230a. Positiveb. Negativec. Zero
 a. negative
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 Determine if the exponent will be positive, negative, or zero when expressed in scientific notation.                            321.7a. positiveb. negativec. zero
 a. positive
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 Determine if the exponent will be positive, negative, or zero when expressed in scientific notation.                            6.87a. positiveb. negativec. zero
 c. zero
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 Determine if the exponent will be positive, negative, or zero when expressed in scientific notation.                            63002a. positiveb. negativec. zero
 a. positve
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 10^5 x 10^3  a. 10^15b. 10^8c. 10^5d. 10^2
 a. 10^8
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 10^-5 x 10^-3  a. 10^-15b. 10^-8c. 10^8d. 10^2
 b.10^-8
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 10^5 x 10^-3  a. 10^15b. 10^8c. 10^2d. 10^-2
 c. 10^2
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 10^-5 x 10^3  a. 10^-8b. 10^8c. 10^2d. 10^-2
 d. 10^-2
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 Solve: (3.245 x10^3) + (1.17 x 10^3) a. 4.415 x10^3b.c.d. 4.42 x10^3
 d. 4.42 x10^3
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 Solve: (9.870 x10^-2) - (5.7 x10^-3) a. 9.3 x10^-2b.c. 9.30 x10^-2d.
 c. 9.30 x10^-2
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 Solve: (9.356 x10^5) + (3.27 x10^5) a. 9.68 x10^5b.c.d.
 a. 9.68 x10^5
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 Solve: (2.030 x10^4) - (1.111 x10^3) a.b. 1.92 x10^4c. 1.919 x10^4d.
 c. 1.919 x10^4
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 Tera = T
 10^12
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 Giga =G
 10^9
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 Mega = M
 10^6
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 Kilo =k
 10^3
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 Hecto =h
 10^2
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 Deca =da
 10^1
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 Deci =d
 10^-1
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 Centi =c
 10^-2
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 Milli = m
 10^-3
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 Micro =µ
 10^-6
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 Nano =n
 10^-9
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 Pico =p
 10^-12
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 Area of a rectangle
 A= length x width
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 Area of a circle
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 Area of a Triange
 Area =½ x base x height
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 Volume of Rectanglar Solid
 Volume = Length x width x height
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 Volume of a Cylinder
 Volume = ∏ x radius^2 x height
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 Volume of a Sphere
 Volume = 4/3 x ∏ x radius^3
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 Conversion of Length cm to in.
 2.540 cm1 in.
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 Conversion of Mass g to lb
 453.6 g1 lb
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 Conversion of Volume L to qt
 0.9463 L1 qt
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 Use the appropraite metric prefix to replace scientific notation: 6.8 x10^-9 m
 6.8 nm
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 Use the appropraite metric prefix to replace scientific notation: 3.2 x10^-6 m
 3.2 µm
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 Use the appropraite metric prefix to replace scientific notation: 7.23 x10^3 L
 7.23 kL
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 Use the appropraite metric prefix to replace scientific notation: 6.5 x10^9 g
 6.5 Gg
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 Convert: 25mg to g
 0.025mg
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 Convert: 323 km to m
 323000 m
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 Convert: 25.0 L to dL
 250 dL
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 Convert: 0.010 g to pg
 ? 1.0 x10^9 pg ?
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 Convert: 244 lb to kg
 111 kg  244 lb x 453.6 g x   1 kg    = 110.6784 kg              1 lb       10^3 g
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 Convert: 0.250 tons to g
 227000 g  0.250 ton x 2000 lb x 453.6 g = 226800 g                  1 ton        1 lb
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 Convert: 24.2 in to mm
 615 mm  24.2 in x 2.540 cm x 10^2 mm =                 1 in          1 cm
question
 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
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 All molecules present are triatomic; two substances are present; one phase is present. a. elementb. compoundc. homogeneous mixtured. heterogeneous mixture
 d. heterogeneous mixture Heterogeneous (1 phase) mixture (2 substances)
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 All molecules present are heteroatomic; one substance is present; two phases are present. a. elementb. compoundc. homogeneous mixtured. heterogeneous mixture
 b. compound One substance, heteroatomic
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 All molecules present are identical and homoatomic; one phase is present. a. elementb. compoundc. homogeneous mixtured. heterogeneous mixture
 a. element one substance of identical homoatomic molecules
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 Both homoatomic and heteroatomic molecules are present; one phase is present. a. elementb. compoundc. homogeneous mixtured. heterogeneous mixture
 c. homogeneous mixture Homogeneos (one phase) mixture (2 types of molecules)
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 One kind of homoatomic molecules is present; one phase is present. a. elementb. compoundc. homogeneous mixtured. heterogeneous mixture
 a. element
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 All molecules present are diatomic; two substances are present; one phase is present. a. elementb. compoundc. homogeneous mixtured. heterogeneous mixture
 b. homogeneous mixture homogeneous (one phase) mixture (two phases)
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 Two kinds of heteroatomic molecules are present; two phases present a. elementb. compoundc. homogeneous mixtured. heterogeneous mixture
 d. heterogeneous mixture Heterogeneous (two phases) mixture (two substances)
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 All molecules present are idenetical, triatomic, and heteroatomic; one phase is present. a. elementb. compoundc. homogeneous mixtured. heterogeneous mixture
 d. compound
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 What does the atomic number indicate? a. number of protonsb. number of neutronsc. number of electronsd. number of protons and electrons
 a. number of protons (a neutral element would have an equal number of protons and eletrons)
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 What does the mass number indicate? a. number of protonsb. number of neutronsc. number of neutrons and protonsd. number of protons and electrons
 c. number of neutrons and protons
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 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)
question
 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%
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 Atoms are the basic building blocks for all kinds of matter a. trueb. false
 a. true
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 Different types of atmos exist. a. trueb. false
 a. true
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 All atoms of a give type are identical a. trueb. false
 b. false
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 NaClO(2) a. compoundb. element
 a. compound
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 CO a. compoundb. element
 a. compound
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 S(8) a. compoundb. element
 b. element
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 Al a. compoundb. element
 b. element
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 posses a negative charge a. electronb. protonc. neutrond. proton and neutron
 a. electron
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 Has mass slightly less than a neutron a. electronb. protonc. neutrond. proton and neutron
 b. proton
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 Can be called a nucleon a. electronb. protonc. neutrond. proton and neutron
 d. proton and neutron
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 heaviest of the three particles a. electronb. protonc. neutrond. proton and neutron
 c. neutron
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 What element has: 5 protons, 5 electrons, and 6 neutrons? a. 9/4 Beb. 12/6 Cc. 1/1 Hd. 11/5B
 d. 11/5 B
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 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)
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 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)
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 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)
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 24/12 X amd 26/12 Q a. isotopesb. isobarsc. neither
 a. isotopes
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 71/31 X amd 71/32 Q a. isotopesb. isobarsc. neither
 b. isobars
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 56/25 X amd 54/24 Q a. isotopesb. isobarsc. neither
 c. neither
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 57/27 X amd 60/27 Q a. isotopesb. isobarsc. neither
 a. isotopes
question
 Calculate atomic mass of Titanium given:Ti-46 = 7.93% (45.95263 amu)Ti-47 = 7.28% (46.9518 amu)Ti-48 = 73.94% (47.94795 amu)Ti-49 = 5.51% (48.94787 amu)Ti-50 = 5.34% (49.9448 amu)
 47.88 amu 0.0793 x 45.95263 = 3.6440.0728 x 46.9518 = 3.4180.7394 x 47.94795 = 35. 453      =  47.8790.0551 x 48.94787 = 2. 6970.0534 x 49.9448 = 2. 667
question
 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 22.3b. 314 and 3.14c. 63,000 and 6,300d. more than one correct reponsee. 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)
question
 Which of the following statements concerning the significatn of zeros in measured numbers correct?a. leading zeros are alway significantb. confinined zeros are always significantc. trailing zeros are never significantd. more than one correct anwsere. no correct anwser
 b. confined zeros are alway significant
question
 In which of the following measured numbers are all of the zeros significant?a. 0.000003140b. 3.0101c. 360, 031, 010d. more than one anwser is correcte. no correct response
 b. 3.0101
question
 In which o the following cases is the given number correctly rounded to three significant figures?a. 241,000 becomes 241b. 0.3334 becomes 0.334c. 42.357 becomes 42.3d. more than one correct responsee. no correct repsonse
 c. 42.257 becomes 42.3
question
 In which of the following pairs of numbers do the two members of the pair have the same uncertainty?a. 3.102 and 5.134b. 0.20 and 0.200c. 301,000 and 300,000d. more than one correct answere. no correct response
 a. 3.102 and 5.134
question
 The calculator anwser obtained from 42.44 x 4.41 x 7.00 is 1013.0428. This anwser:a. is correct as writtenb. should be rounded to 1013c. should be rounded to 1010d. more than one correct responsee. no correct response
 c. should be rounded to 1010
question
 The correct answer obtained from adding the measurements 8.1, 3.14, and 97.143 contains:a. 2 significant figuresb. 3 significant figuresc. 4 significant figuresd. 5 significant figurese. no correct response
 a. 2 significant figures
question
 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 responsee. no correct response
 c. 7.02 x (0.0001 + 0.011)
question
 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 0.13b. 7/0.13c. 7 + 0.13d. more than one correct responsee. no correct response
 e. no correct response all responses only contain 2 significant figures
question
 In which of the following cases is the given number correctly converted to scientific notation?a. 321,000 becomes 3.21 x10^4b. 0.00300 becomes 3 x10^-3c. 31.040 becomes 3.104 x10^1d. more than one correct responsee. no correct response
 ? e. no correct reponse ? a. is incorrect, b. and c. have incorrect significant figures
question
 In which of the following pairs of numbers do the two members have the same uncertainty?a. 4.80 x10^5 and 4.80 x10^6b. 3.21 x10^-4 and 3.2 x10^-3c. 3 x10^-5 and 3.2211 x10^-1d. more than one correct responsee. no correct response
 ? d. 3 x10^-5 and 3.2211 x10^-1 ? 0.000030.32211±0.00001
question
 In which of the following pairs of number are the two numbers totally equivalent?a. 3200 and 3.200 x10^3b. 0.20 and 2.0 x10^-1c. 4713.0 and 4.7130 x10^3d. more than one correct responsee. no correct response
 d. more than one correct response all responses are totally equivalent
question
 Which of the following metric system prefixes is correctly pair with its mathematical meaning?a. milli- and 10^-2b. micro- and 10^-6c. giga- and 10^-9d. more than one correct responsee. no correct response
 c. micro- and 10^-6  a. milli- (10^-3) and 10^-2 (centi-)c. giga- (10^9) and 10^-9 (nano-)
question
 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 responsee. no correct repsonse
 e. no correct response
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