Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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The SI unit of mass is the ____.
a. | Newton | b. | liter | c. | kilogram | d. | mole | e. | ounce |
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2.
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Ethanol boils at 351.7 K. What is this temperature in Celsius?
a. | 1.29 °C | b. | 53.5 °C | c. | 78.5 °C | d. | 227.4 °C | e. | 624.9 °C |
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3.
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Which of the following is the greatest length?
a. | 5.0 ´ 108 pm | b. | 5.0 ´ 106 nm | c. | 5.0 ´
101 mm | d. | 5.0 ´
10–1 mm | e. | 5.0 ´
10–5 m |
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4.
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The radius of an aluminum atom is 0.143 nm. What is the radius in
picometers?
a. | 1.43 ´ 10–12 pm | b. | 1.43 ´ 10–9 pm | c. | 1.43 ´
10–2 pm | d. | 1.43 ´
10–1 pm | e. | 1.43 ´
102 pm |
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5.
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Two electronic balances are tested using a standard weight. The true mass of the
standard is 2.5000 g. The results of 5 individual measurements on each balance are recorded
below. | | | Balance A | Balance
B | | | | 2.4999 g | 2.7022
g | | | | 2.5003 g | 2.5113
g | | | | 2.5000 g | 2.4940
g | | | | 2.4998 g | 2.2781
g | | | | 2.5002 g | 2.5145
g | | | average
mass = | 2.5000 g | 2.5000 g | | | | |
Which statement best describes the results? a. | A: poor precision, good accuracy. B: good precision, good
accuracy. | b. | A: good precision, good accuracy. B: poor precision, good
accuracy. | c. | A: good precision, good accuracy. B: good precision, poor
accuracy. | d. | A: poor precision, good accuracy. B: good precision, poor
accuracy. | e. | A: good precision, poor accuracy. B: poor precision, good
accuracy. |
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6.
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Express 0.08010 in exponential notation.
a. | 8.01 ´ 10–2 | b. | 8.01 ´ 102 | c. | 8.010 ´
10–2 | d. | 8 ´
10–2 | e. | 8.010 ´
102 |
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7.
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Convert 0.490 ng to grams and express the answer in scientific notation using
the correct number of significant figures.
a. | 4.90 ´ 10–8 g | b. | 4.90 ´ 10–10 g | c. | 4.9 ´
10–10 g | d. | 0.490 ´
10–8 g | e. | 0.490 ´
10–10 g |
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8.
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What is the correct answer to the following expression: (86.11 – 85.49)
¸ 28.26? Carry out the subtraction operation first.
a. | 2 ´ 10–2 | b. | 2.2 ´ 10–2 | c. | 2.19 ´
10–2 | d. | 2.194 ´
10–2 | e. | 2.1939 ´
10–2 |
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9.
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What is the correct answer to the following expression: 9.27 ´ 10–4 + 6.3 ´
10–6?
a. | 9 ´ 10–4 | b. | 9.3 ´10–4 | c. | 9.33 ´
10–4 | d. | 9.333 ´
10–4 | e. | 9.3330 ´
10–4 |
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10.
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The wavelength of light emitted from a particular red diode laser is 6.72 ´ 10–7 m. What is the wavelength in nanometers?
a. | 0.672 nm | b. | 6.72 nm | c. | 67.2
nm | d. | 672 nm | e. | 6.72 ´
103 nm |
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11.
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The radius of a bromine atom is 114 pm. What is the volume of a bromine atom in
cubic centimeters? The volume of a sphere is (4/3)pr3.
a. | 6.21 ´ 10–30
cm3 | b. | 6.21 ´ 10–24
cm3 | c. | 6.21 ´ 10–6
cm3 | d. | 6.21 ´ 10–4
cm3 | e. | 6.21 ´ 106
cm3 |
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12.
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Which of the following observations is quantitative?
a. | The liquid turns blue litmus paper red. | c. | The liquid tastes
bitter. | b. | The liquid boils at 100ºC. | d. | The liquid is
cloudy. |
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13.
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Which of the following observations is qualitative?
a. | A chemical reaction is complete in 2.3 seconds. | b. | The solid has a mass
of 23.4 grams. | c. | The pH of a liquid is 5. | d. | Salt deposits form from an evaporated
liquid. |
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14.
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The symbol mm represents
a. | micrometer. | c. | milliliter. | b. | millimeter. | d. | meter. |
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15.
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The symbol for the metric unit used to measure mass is
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16.
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The quantity of matter per unit volume is
a. | mass. | c. | inertia. | b. | weight. | d. | density. |
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17.
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The density of aluminum is 2.70 g/cm3. The volume of a solid piece of
aluminum is 1.50 cm3. Find its mass.
a. | 1.50 g | c. | 2.70 g | b. | 1.80 g | d. | 4.05 g |
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18.
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The mass of a 6.0 mL sample of kerosene is 4.92 g. The density of kerosene
is
a. | 0.82 g/mL. | c. | 1.2 g/mL. | b. | 0.92 g/cm3. | d. | 1.5
g/cm3. |
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19.
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Convert –25ºC to the kelvin scale.
a. | –323.15 K | c. | 248.15 K | b. | –248.15 K | d. | 323.15 K |
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20.
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Precision pertains to all of the following EXCEPT
a. | reproducibility of measurements. | b. | agreement among numerical
values. | c. | sameness of measurements. | d. | closeness of a measurement to an accepted
value. |
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21.
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In division and multiplication, the answer must not have more significant
figures than the
a. | number in the calculation with fewest significant figures. | b. | number in the
calculation with most significant figures. | c. | average number of significant figures in the
calculation. | d. | total number of significant figures in the
calculation. |
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22.
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When 64.4 is divided by 2.00, the correct number of significant figures in the
result is
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23.
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The result of dividing 107 by 10–3 is
a. | 10–4. | c. | 104. | b. | 102.5. | d. | 1010. |
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