Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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The correct answer for the addition shown below is: 3.914 cm + 243.10 cm + 12.0046 cm = A) | 259.0186 cm | B) | 259.019 cm | C) | 259.0
cm | D) | 259.02 cm |
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2.
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The energy associated with the motion of particles
in a substance is called
A) | potential energy | B) | chemical energy | C) | heat | D) | temperature |
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3.
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When a solid is converted directly to a gas, the
change of state is called
A) | sublimation | B) | condensation | C) | freezing | D) | fusion |
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4.
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How many significant figures does the measurement 0.00480 cm contain?
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5.
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Brass is an example of
A) | an element | B) | a homogeneous mixture | C) | a
compound | D) | a heterogeneous mixture |
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6.
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The temperature of 42.0 °C is equivalent to
A) | 231 K | B) | 53.3 °F | C) | 5.55
°F | D) | 108 °F |
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7.
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Express 0.00382 in scientific notation.
A) | 3.82 x 103 | B) | 0.382 x
10–2 | C) | 3.82 x
10–2 | D) | 3.82 x
10–3 |
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8.
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The number 43250 when rounded to three significant figures would appear
as
A) | 433 | B) | 43300 | C) | 43000 | D) | 43200 |
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9.
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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 Calories (2 sig figs) does this sample contain?
(The caloric values are: 4 kcal/g for carbohydrate, 9 kcal/g for fat, and 4 kcal/g for
protein.)
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10.
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Which of the following is NOT a characteristic of solutions?
A) | variable composition | B) | a homogeneous mixture | C) | a heterogeneous
mixture | D) | contains two or more substances |
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11.
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The state of matter that lacks definite volume is
A) | gas | B) | solid | C) | gas and
liquid | D) | liquid |
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12.
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On a heating curve a plateau corresponds to
A) | a change in temperature of a solid.
| B) | a change in temperature of a liquid.
| C) | a change of state. | D) | a change in
temperature of a gas. |
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13.
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When 20.0 g of mercury is heated from 10.0 °C to 20.0 °C, 27.6 J of
energy are absorbed. What is the specific heat of mercury?
A) | 2.76 J/g°C | B) | 0.726 J/g°C | C) | 552
J/g°C | D) | 0.138 J/g°C |
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14.
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37.4 cm x 2.2 cm equals
A) | 82 cm2 | B) | 82.3 cm2 | C) | 82.28
cm2 | D) | 82.2 cm2 |
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15.
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The specific heat of aluminum is 0.9 J/g°C. How many joules of energy
are required to raise the temperature of 20 g of aluminum from 10 °C to 15 °C? (Ignore
significant figures for this question)
A) | 90 J | B) | 100 J | C) | 112
J | D) | 79 J |
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16.
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The mass of a block is 9.43 g and its density is 2.35 g/cm3.
The volume of the block is
A) | 22.2 cm3 | B) | 2.49 cm3 | C) | 0.249
cm3 | D) | 4.01 cm3 |
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17.
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If the heat of fusion for water is 80. cal/g, how
many kcals are needed to melt 45.0 g of ice at 0 °C?
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18.
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A theory is
A) | a law that is yet to be tested and validated. | B) | a hypothesis that
has been tested and validated over a long period of time. | C) | a hypothesis that is
yet to be tested and validated. | D) | a law that has been tested and validated by
several scientific organizations. |
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