Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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How
many significant digits are there in the following number: 15.30 g
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2.
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How
many significant digits are in the following number: 1000 lbs
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3.
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How
many significant digits are in the following number: 0.00032 m
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4.
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How
many significant digits are in the following number: 1.67 x 10-2 m
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5.
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Express the following number in ordinary notation : 5.99 x
103 a. | 599 | c. | 5990 | b. | 0.599 | d. | 0.00599 | | | | |
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6.
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Perform the following calculation. Place your answer in the correct number of
significant digits and in the correct unit : 15.996 g - 5.72 g a. | 10.28
g | c. | 10.3
g2 | b. | 10.275 g | d. | 10.3 g | | | | |
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7.
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Perform the following calculation. Place your answer in the correct number of
significant digits and in the correct unit : (2.65 ´ 106) + (3.97 ´
105) a. | 3.047 x 106 | c. | 3047000 | b. | 3.05 x
106 | d. | 3.047 x
10-6 | | | | |
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8.
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Perform the following calculation. Place your answer in the correct number of
significant digits and in the correct unit : (5.26 ´ 10–8) ´ (8.3
´
10–3) a. | 4.37 x 10-9 | c. | 4.37 x 1014 | b. | 4.4 x
10-9 | d. | 4.4 x
1014 | | | | |
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9.
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Perform the following calculation. Place your answer in the correct number of
significant digits and in the correct unit : 145.00 g / 120 mL a. | 1.2
g/ml | c. | 1
g/ml | b. | 1.21
g/ml | d. | 1.208
g/ml | | | | |
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10.
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Claculate the number of kilometers in 3.69 m a. | 0.0369
km | c. | 3690
km | b. | 0.00369
km | d. | 369
km | | | | |
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11.
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How
many seconds are in 22 days? a. | 15840 sec | c. | 31680 sec | b. | 1.9 x
106sec | d. | 528
sec | | | | |
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12.
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Convert 100 nm into mm a. | 0.0001 mm | c. | 1 x 10-7mm | b. | 1 x
10-8mm | d. | 1 x
10-10mm | | | | |
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13.
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Convert 40.0ºC to Kelvin a. | 175 K | c. | 215 K | b. | 313
K | d. | -233
K | | | | |
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14.
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Ethyl
aclohol boils at 78.5 ºC. Convert this to Fahrenheit. a. | 109
ºF | c. | 173
ºF | b. | 25.9 ºF | d. | 199 ºF | | | | |
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15.
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You
have a 55.0 g sample of ethanol. If the density of ethanol is 0.7893 g/ml, what volume of ethanol do
you have? a. | 69.7
mL | c. | 43.4
mL | b. | 0.0144
mL | d. | 10.6
mL | | | | |
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16.
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A
piece of metal with a mass of 38.5 g is placed in a 50.0 mL graduated cylinder. The water level rises
from 20.0 mL to 35.5 mL. What is the density of the metal? a. | 0.770
g/ml | c. | 1.93
g/ml | b. | 0.922 g/
ml | d. | 1.19
g/ml | | | | |
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17.
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To
determine density, the quantities that must be measured are a. | mass and
weight. | c. | volume and
concentration. | b. | volume and weight. | d. | volume and mass. | | | | |
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18.
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If
some measurements agree closely with each other but differ widely from the actual value, these
measurements are a. | neither precise
nor accurate | c. | accurate, but
not precise. | b. | acceptable as a new standard of
accuracy. | d. | precise, but not
accurate. | | | | |
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19.
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Expressed in scientific notation, 0.0930 m is a. | 93 x
10-3 m. | c. | 9.30 x
10-2 m. | b. | 9.3 x 10-3 m. | d. | 9.30 x 10-4 m. | | | | |
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20.
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A standard
for comparison that helps to ensure that the experimental result is caused by the condition being
tested is the ____. a. | constant | c. | dependant variable | b. | control | d. | hypothesis | | | | |
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21.
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An
object has a mass of 48 kilograms on Earth. What is this object’s mass on the moon? (The
gravitational pull on the moon is1/6 that of the gravitational pull on Earth.) a. | 48
kilograms | c. | 8
pounds | b. | 48 pounds | d. | 8 kilograms | | | | |
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22.
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A
biologist is studying how earthworms behave in response to moisture. Which of the following is the
dependent variable in this experiment? a. | the earthworm’s behavior | c. | the temperature of the room | b. | the amount of
moisture | d. | the
earthworm | | | | |
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23.
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A
means of expressing numbers as a multiple of two factors: a number between 1 and 10; and ten raised
to a power, or exponent a. | base unit | c. | dimensional analysis | b. | derived
unit | d. | scientific
notation | | | | |
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24.
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You
calculate that 139 000 000 m is the answer to a problem. You are asked to write your answer in
scientific notation. Which answer is correct? a. | 1.39 x 108 | c. | 14 x 1010 | b. | 13.9 x
1010 | d. | 1.4 x
108 | | | | |
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25.
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Refers to how close a measured value is to an accepted value a. | percision | c. | derived
unit | b. | accuracy | d. | dimensional
analysis | | | | |
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