Chemistry: The molecular nature of matter and change 3rd
Canadian Edition by Silberberg || Complete Exam Prep
Chemsitry Study Guide Questions with Verified Answers and
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❖ Chemistry: The molecular nature of matter and change 3rd
Canadian Edition by Silberberg
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Verified Answers
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1) Which of the following correctly shows how to convert a density of 20.1 g cm to units
of kg m -3?
A)
B)
C)
D)
E)
2) Which one of the following numbers contains a digit or digits which is/are not
significant?
A) 970.0
B) 502
C) .300
D) .0043
E) 20.01
3) A car tire is rated for 34.0 psi (pounds per square inch). The pressure gauge used only
reports pressure in kPa (kilopascal). Given that 1 psi = 6895 Pa, calculate the tire rating in kPa.
A) 234 kPa
B) 101 kPa
C) 652 kPa
D) 89.1 kPa
E) 760 kPa
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,4) The result of (3.8621 × 1.5630) - 5.98 is properly written as
A) 0.06
B) 0.056
C) 0.0565
D) 0.05646
E) 0.056462
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5) Given that 1 inch = 2.54 cm, 1 cm is equal to
A) 16.4 in 3
B) 6.45 in 3
C) 0.394 in 3
D) 0.155 in 3
E) 0.0610 in 3
6) At room temperature, a hydrogen molecule moves at an average velocity of 2.20 km/s.
What is it's velocity in m/s?
A) 2.20 × 10 4 m/s
B) 0.0220 m/s
C) 2.20 × 10 -2 m/s
D) 2.20 × 10 3 m/s
E) 2.20 × 10 2 m/s
7) The distance between carbon atoms in ethylene is 134 picometers. Which of the
following expresses that distance in meters?
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, -13
A) 1.34 × 10 m
-12
B) 1.34 × 10 m
-10
C) 1.34 × 10 m
-7
D) 1.34 × 10 m
-6
E) 1.34 × 10 m
8) The average distance from Earth to the Sun is 150 megameters. What is that distance in
meters?
8
A) 1.5 × 10 m
6
B) 1.5 × 10 m
5
C) 1.5 × 10 m
3
D) 1.5 × 10 m
-6
E) 1.5 × 10 m
9) A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When
the same flask is filled with concentrated sulfuric acid, H 2SO 4, its mass is 1026.57 g. What is
the density of concentrated sulfuric acid? (Assume water has a density of 1.00 g/cm 3 at the
temperature of the measurement.)
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A) 1.992 g/cm
3
B) 1.840 g/cm
3
C) 1.729 g/cm
3
D) 1.598 g/cm
3
E) 0.543 g/cm
10) Which of the following represents the largest volume?
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