Chemistry: The Central Science , 12th Edition Test Bank

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TEST I TEM FILE
Aaron Skelhorne
MacEwan University
Alen Hadzovic
University of Toronto
Chemistry:
A Molecular Approach
First Canadian Edition
Nivaldo J. Tro
Westmount College
Travis Fridgen
Memorial University of Newfoundland
Lawton E. Shaw
Athabasca University
With contributions by
Robert S. Boikess
Rutgers University

Chemistry: A Molecular Approach, 1ce
Chapter 1: Units of Measurement for Physical and Chemical Change
Chapter 1 Units of Measurement for Physical and Chemical Change
Multiple Choice Questions
1) Which of the following is an example of physical change?
A) Sugar is dissolved in water.
B) Tea is brewed.
C) Dry ice sublimes.
D) Ice (solid water) melts.
E) All of the above are examples of physical change.
Answer: E
Diff: 1 Type: MC Var: 1 Page Ref: 1.1
2) Which of the following is an example of physical change?
A) Dew forms on a blade of grass.
B) A Halloween light stick glows after shaking.
C) An egg solidifies during cooking.
D) A hydrogen balloon explodes when contacted with a flame.
E) None of the above is a physical change.
Answer: A
Diff: 1 Type: MC Var: 1 Page Ref: 1.1
3) Which of the following is an example of a chemical change?
A) Copper building materials develop a green patina over time.
B) A match burns.
C) Ethanol evaporates.
D) Both A and B are examples of chemical change.
E) All of the above are examples of chemical change.
Answer: D
Diff: 1 Type: MC Var: 1 Page Ref: 1.1
4) Which of the following is an example of a chemical change?
A) tea brewing
B) water boiling
C) leaves turning colour in the fall
D) salt dissolving in water
E) None of the above is a chemical change.
Answer: C
Diff: 1 Type: MC Var: 1 Page Ref: 1.1

Chemistry: A Molecular Approach, 1ce
Chapter 1: Units of Measurement for Physical and Chemical Change
5) A physical change
A) occurs when iron rusts.
B) occurs when sugar is heated into caramel.
C) occurs when glucose is converted into energy within your cells.
D) occurs when water is evaporated.
E) occurs when propane is burned for heat.
Answer: D
Diff: 1 Type: MC Var: 1 Page Ref: 1.1
6) A chemical change
A) occurs when methane gas is burned.
B) occurs when paper is shredded.
C) occurs when water is vaporized.
D) occurs when salt is dissolved in water.
E) occurs when powdered lemonade is stirred into water.
Answer: A
Diff: 1 Type: MC Var: 1 Page Ref: 1.1
7) Which of the following represents a physical property?
A) Sodium metal is extremely reactive with chlorine gas.
B) Mercury is a silvery liquid at room temperature.
C) Aluminum has a tendency to "rust."
D) Butane is highly flammable.
E) Argon has an unreactive nature.
Answer: B
Diff: 1 Type: MC Var: 1 Page Ref: 1.1
8) Which of the following represents a chemical property of hydrogen gas?
A) It is gaseous at room temperature.
B) It is less dense than air.
C) It reacts explosively with oxygen.
D) It is colourless.
E) It is tasteless.
Answer: C
Diff: 1 Type: MC Var: 1 Page Ref: 1.1
9) Define thermal energy.
A) energy associated with the temperature of an object
B) energy associated with the motion of an object
C) energy associated with the force of an object
D) energy associated with the gravity of an object
Answer: A
Diff: 1 Type: MC Var: 1 Page Ref: 1.2

Chemistry: A Molecular Approach, 1ce
Chapter 1: Units of Measurement for Physical and Chemical Change
10) Which of the following is an SI base unit?
A) volt
B) gram
C) hour
D) kelvin
E) dozen
Answer: D
Diff: 1 Type: MC Var: 1 Page Ref: 1.3
11) Identify the unit of measurement that is a SI base unit of measurement.
A) second
B) Celsius
C) cup
D) pound
E) yard
Answer: A
Diff: 1 Type: MC Var: 1 Page Ref: 1.3
12) Kilogram is a measure of
A) mass.
B) time.
C) temperature.
D) length.
E) volume.
Answer: A
Diff: 1 Type: MC Var: 1 Page Ref: 1.3
13) Metre is a measure of
A) mass.
B) time.
C) temperature.
D) length.
E) volume.
Answer: D
Diff: 1 Type: MC Var: 1 Page Ref: 1.3
14) Kelvin is a measure of
A) mass.
B) time.
C) temperature.
D) length.
E) volume.
Answer: C
Diff: 1 Type: MC Var: 1 Page Ref: 1.3

Chemistry: A Molecular Approach, 1ce
Chapter 1: Units of Measurement for Physical and Chemical Change
15) Second is a measure of
A) mass.
B) time.
C) temperature.
D) length.
E) volume.
Answer: B
Diff: 1 Type: MC Var: 1 Page Ref: 1.3
16) Mole is a measure of
A) luminous intensity.
B) amount.
C) mass.
D) length.
E) current.
Answer: B
Diff: 1 Type: MC Var: 1 Page Ref: 1.3
17) Ampere is a measure of
A) luminous intensity.
B) amount.
C) mass.
D) length.
E) current.
Answer: E
Diff: 1 Type: MC Var: 1 Page Ref: 1.3
18) Which of the following is an example of intensive properties?
A) density
B) volume
C) mass
D) None of the above is an example of intensive properties.
E) All of the above are examples of intensive properties.
Answer: A
Diff: 1 Type: MC Var: 1 Page Ref: 1.3
19) Which of the following is an example of extensive properties?
A) mass
B) colour
C) density
D) temperature
E) taste
Answer: A
Diff: 1 Type: MC Var: 1 Page Ref: 1.3

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Chemistry: A Molecular Approach, 1ce
Chapter 1: Units of Measurement for Physical and Chemical Change
20) Identify the common substance that has the highest density.
A) sugar
B) water
C) glass
D) lead
E) aluminum
Answer: D
Diff: 1 Type: MC Var: 1 Page Ref: 1.3
21) Identify the common substance that has the lowest density.
A) ice
B) aluminum
C) copper
D) table salt
E) sugar
Answer: A
Diff: 1 Type: MC Var: 1 Page Ref: 1.3
22) If the temperature is 178 °F, what is the temperature in degrees Celsius?
A) 352 °C
B) 451 °C
C) 67 °C
D) 81.1 °C
E) 378 °C
Answer: D
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
23) How many ns are in 16 ms?
A) 1.6 × 10-2 ns
B) 1.6 × 107 ns
C) 1.6 × 10-5 ns
D) 1.6 × 105 ns
E) 1.6 × 102 ns
Answer: B
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
24) How many dm are in 345 dam?
A) 0.345 dm
B) 3.45 dm
C) 3450 dm
D) 34500 dm
E) 345000 dm
Answer: D
Diff: 2 Type: MC Var: 1 Page Ref: 1.3

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Chemistry: A Molecular Approach, 1ce
Chapter 1: Units of Measurement for Physical and Chemical Change
25) Convert 514 nm to m and express it in scientific notation.
A) 514 × 10-5 m
B) 5.14 × 10-7 m
C) 51.4 × 10-7 m
D) 5.14 × 1011 m
E) 5.14 × 10-9 m
Answer: B
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
26) Convert 12.5 μL to L and express it in scientific notation.
A) 1.25 × 105 L
B) 1.25 × 107 L
C) 1.25 × 10-3 L
D) 1.25 × 10-7 L
E) 1.25 × 10-5 L
Answer: E
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
27) Convert 8.3 mg to μg.
A) 0.0083 μg
B) 83 μg
C) 830 μg
D) 8300 μg
E) 83000 μg
Answer: D
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
28) Convert 46.9 GHz to THz.
A) 0.0469 THz
B) 46900 THz
C) 0.469 THz
D) 4690 THz
E) 0.000469 THz
Answer: A
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
29) If the speed limit on a highway is 100 km h-1, what is the speed limit in m h-1?
A) 1 × 107 m h-1
B) 0.1 m h-1
C) 1 × 103 m h-1
D) 1 × 105 m h-1
E) 1 × 101 m h-1
Answer: D
Diff: 2 Type: MC Var: 1 Page Ref: 1.3

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Chemistry: A Molecular Approach, 1ce
Chapter 1: Units of Measurement for Physical and Chemical Change
30) Convert 3000 m h-1 to km h-1.
A) 3 km h-1
B) 0.3 km h-1
C) 30 km h-1
D) 300 km h-1
E) 0.03 km h-1
Answer: A
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
31) Convert 1.34 km2 to m2.
A) 1340000 m2
B) 134000 m2
C) 1.34 × 107 m2
D) 1.34 × 104 m2
E) 1340 m2
Answer: A
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
32) Convert 4392 m3 to hm3.
A) 4.392 × 10-5 hm3
B) 4.392 × 10-3 hm3
C) 4.392 × 10-1 hm3
D) 4.392 × 101 hm3
E) 4.392 × 102 hm3
Answer: B
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
33) If a solution has a temperature of 355 K, what is its temperature in degrees Celsius?
A) 165 °C
B) 628 °C
C) 179 °C
D) 279 °C
E) 82 °C
Answer: E
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
34) If the outside temperature is 35 °C, what is the temperature in K?
A) -238 K
B) 308 K
C) 95 K
D) 31 K
E) 63 K
Answer: B
Diff: 2 Type: MC Var: 1 Page Ref: 1.3

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Chemistry: A Molecular Approach, 1ce
Chapter 1: Units of Measurement for Physical and Chemical Change
35) Determine the density of an object that has a mass of 149.8 g and displaces 12.1 mL of water when
placed in a graduated cylinder.
A) 8.08 g mL-1
B) 1.38 g mL-1
C) 12 .4 g mL-1
D) 18.1 g mL-1
E) 11.4 g mL-1
Answer: C
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
36) Determine the volume of an object that has a mass of 455.6 g and a density of 19.3 g cm-1.
A) 87.9 mL
B) 42 .4 mL
C) 18.5 mL
D) 23.6 mL
E) 31.2 mL
Answer: D
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
37) Determine the mass of an object that has a volume of 88.6 mL and a density of 9.77 g mL-1.
A) 298 g
B) 1100 g
C) 907 g
D) 568 g
E) 866 g
Answer: E
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
38) If the outside air temperature is 30 °F, what is the temperature in kelvin?
A) 303 K
B) 307 K
C) 274 K
D) 272 K
Answer: D
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
39) If the outside temperature is 35 °C, what is the temperature in °F?
A) 95 °F
B) 31 °F
C) 121 °F
D) 5.4 °F
E) 63 °F
Answer: A
Diff: 2 Type: MC Var: 1 Page Ref: 1.3

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Chemistry: A Molecular Approach, 1ce
Chapter 1: Units of Measurement for Physical and Chemical Change
40) A solution has a temperature of 68 °C. What is the temperature in K?
A) 427 K
B) 20 K
C) 154 K
D) 341 K
E) 296 K
Answer: D
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
41) A solution has a temperature of 18.65 °C. What is the temperature in K?
A) 324.80 K
B) 291.80 K
C) 301.65 K
D) 65.57 K
E) 283.15 K
Answer: B
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
42) A gas phase mixture has a temperature of 643 °C. Calculate the temperature in K.
A) 916 K
B) 873 K
C) 188 K
D) 1391 K
E) 370 K
Answer: A
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
43) An unknown metal is heated to 850 °F. What is the temperature in K?
A) 1350 K
B) 1120 K
C) 460 K
D) 540 K
E) 730 K
Answer: E
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
44) The melting point of copper is 1984 °F. What is the melting point in K?
A) 1724 K
B) 1631 K
C) 1358 K
D) 2257 K
E) 1286 K
Answer: C
Diff: 2 Type: MC Var: 1 Page Ref: 1.3

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Chemistry: A Molecular Approach, 1ce
Chapter 1: Units of Measurement for Physical and Chemical Change
45) Ethylene glycol is commonly used as antifreeze in the cooling systems of vehicles due to its low
freezing point, 8.6 °F. What is the freezing point in K?
A) 280 K
B) -13 K
C) 260 K
D) 273 K
E) 240 K
Answer: C
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
46) Ethylene glycol is commonly used as antifreeze in the cooling systems of vehicles due to its low
freezing point, 8.6 °F. What is the freezing point in °C?
A) 0.0°C
B) -13°C
C) -26°C
D) -45°C
E) -54°C
Answer: B
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
47) Ethanol has a boiling point of 351 K. What is the boiling point in °C?
A) 78 °C
B) -195 °C
C) 122 °C
D) 62 °C
E) 86 °C
Answer: A
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
48) Ethanol has a freezing point of 159 K. What is the freezing point in °C?
A) -81 °C
B) -78 °C
C) -62 °C
D) -114 °C
E) -195 °C
Answer: D
Diff: 2 Type: MC Var: 1 Page Ref: 1.3
49) A student performs an experiment to determine the density of a sugar solution. She obtains the
following results: 1.11 g mL-1, 1.81 g mL-1, 1.95 g mL-1, 1.75 g mL-1. If the actual value for the density of
the sugar solution is 1.75 g mL-1, which statement below best describes her results?
A) Her results are precise, but not accurate.
B) Her results are accurate, but not precise.
C) Her results are both precise and accurate
D) Her results are neither precise nor accurate.
E) It isn't possible to determine from the information given.
Answer: D
Diff: 1 Type: MC Var: 1 Page Ref: 1.4

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Chemistry: A Molecular Approach, 1ce
Chapter 1: Units of Measurement for Physical and Chemical Change
50) A student performs an experiment to determine the density of a sugar solution. She obtains the
following results: 1.71 g mL-1, 1.73 g mL-1, 1.67 g mL-1, 1.69 g mL-1. If the actual value for the density of
the sugar solution is 1.40 g mL-1, which statement below best describes her results?
A) Her results are precise, but not accurate.
B) Her results are accurate, but not precise.
C) Her results are both precise and accurate
D) Her results are neither precise nor accurate.
E) It isn't possible to determine from the information given.
Answer: A
Diff: 1 Type: MC Var: 1 Page Ref: 1.4
51) A student performs an experiment to determine the density of a sugar solution. She obtains the
following results: 1.79 g mL-1, 1.81 g mL-1, 1.80 g mL-1, 1.81 g mL-1. If the actual value for the density of
the sugar solution is 1.80 g mL-1, which statement below best describes her results?
A) Her results are precise, but not accurate.
B) Her results are accurate, but not precise.
C) Her results are both precise and accurate
D) Her results are neither precise nor accurate.
E) It isn't possible to determine from the information given.
Answer: C
Diff: 1 Type: MC Var: 1 Page Ref: 1.4
52) Systematic error is defined as
A) error that tends to be consistently too high or too low.
B) error that has equal probability of being too high or too low.
C) error that averages out with repeated trials.
D) error that is random.
Answer: A
Diff: 1 Type: MC Var: 1 Page Ref: 1.4

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Chemistry: A Molecular Approach, 1ce
Chapter 1: Units of Measurement for Physical and Chemical Change
54) Read the temperature with the correct number of significant figures.
A) 87 °C
B) 87.2 °C
C) 87.20 °C
D) 87.200 °C
E) 87.2000 °C
Answer: C
Diff: 2 Type: MC Var: 1 Page Ref: 1.4
55) Read the length of the metal bar with the correct number of significant figures.
A) 20 cm
B) 15 cm
C) 15.0 cm
D) 15.00 cm
E) 15.000 cm
Answer: C
Diff: 2 Type: MC Var: 1 Page Ref: 1.4

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Chemistry: A Molecular Approach, 1ce
Chapter 1: Units of Measurement for Physical and Chemical Change
56) Read the length of the metal bar with the correct number of significant figures.
A) 20 cm
B) 15 cm
C) 15.0 cm
D) 15.00 cm
E) 15.000 cm
Answer: D
Diff: 2 Type: MC Var: 1 Page Ref: 1.4
57) How many significant figures are in 1009.630 mL?
A) 3
B) 4
C) 5
D) 6
E) 7
Answer: E
Diff: 2 Type: MC Var: 1 Page Ref: 1.4
58) How many significant figures are in 3.408 × 104 m?
A) 3
B) 4
C) 5
D) 7
E) 8
Answer: B
Diff: 2 Type: MC Var: 1 Page Ref: 1.4

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