Multiple Choice
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1.
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Which of the following statements is true?
A) | Element, compounds and some mixtures are pure substances. | B) | Element, but not
compounds are pure substances. | C) | Both elements and compounds are pure
substances. | D) | Compounds, but not elements are pure substances. |
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2.
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Coffee is an example of
A) | a homogeneous mixture | B) | an element | C) | a
compound | D) | a heterogeneous mixture |
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3.
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The number 0.0030201, when rounded to 3 significant figures would appear
as
A) | 0.00302 | B) | 0.003 | C) | 0.0030 | D) | 0.00321 |
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4.
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The mass of a pill is 550 mg. What is this mass in kg?
A) | 5.50 x 105 kg | B) | 5.50 x 10–1
kg | C) | 5.50 x 108 kg | D) | 5.50 x 10–4
kg |
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5.
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Which of the following is the correct answer for the mathematical operation
shown below?
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6.
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The specific heat of copper is 0.093cal/g °C,
and the specific heat of silver is 0.057 cal/g °C. If 100 cal of heat is added to one g of each
metal at 25 °C, what is the expected result?
A) | The copper will reach a temperature lower than 25
°C. | B) | The silver will reach a higher temperature.
| C) | The two samples will reach the same temperature.
| D) | The copper will reach a higher temperature.
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7.
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Which of the follwoing is a pure substance?
A) | distilled water | B) | blood | C) | air | D) | ketchup |
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8.
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Expressed in scientific notation and rounded to four significant figures, the
number 0.00023648 is
A) | 2.364 x 10–4 | B) | 2.365 x
10–4 | C) | 0.2365 x
10–3 | D) | 23.65 x
10–5 |
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9.
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Which one of the following properties describes a
liquid?
A) | fills the entire volume of the container
| B) | particles move very rapidly | C) | particles are close together and move randomly | D) | has its own shape |
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10.
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How many cm are in 4.50 ft? (1 in = 2.54 cm)
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11.
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How many calories are required to raise the
temperature of a 35.0 g sample of iron from 25 °C to 35 °C? Iron has a specific heat
of 0.108 cal/g °C.
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12.
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The density of copper is 8.92 g/cm3. The mass of a piece of
copper with a volume of 9.5 cm3 is
A) | 1.1 g | B) | 85 g | C) | 0.94
g | D) | 2.6 g |
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13.
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267 °F is equivalent to
A) | 540 K | B) | 116 °C | C) | 389
K | D) | 404 K |
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14.
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The heat of vaporization for water is 540
cal/g. How many kilocalories are needed to change 22 g of liquid water to steam at 100
°C?
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15.
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The correct answer for the operation shown below is: (3.00 x 102)(1.200 x 104) = A) | 3.6 x 106 | B) | 3.60 x 106 | C) | 3.600 x
108 | D) | 3.6 x 108 |
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