Question 1

A student makes several measurements of the density of an unknown mineral sample. She then reports the average value of these measurements. The number of significant figures she uses in her result should be a measure of its

Accepted Answer

A)   accuracy.
B)   precision.
C)   systematic error.
D)   determinate error.
E)   human error.F) A) and E)
G) C) and D)

Question 2

The speed needed to escape the pull of Earth's gravity is 11.3 km/s. What is this speed in mi/h?

Accepted Answer

A)   65,500 mi/h
B)   25,300 mi/h
C)   18,200 mi/h
D)   1,090 mi/h
E)   5.02 × 10-3 mi/hF) C) and D)
G) All of the above

Question 3

During the swing of a frictionless pendulum, what energy form(s)  remain constant?

Accepted Answer

A)   kinetic energy only
B)   potential energy only
C)   both kinetic energy and potential energy
D)   kinetic plus potential energy
E)   None of these choices are correct.F) A) and B)
G) All of the above

Question 4

Which of the following abbreviations of the given SI base unit is incorrect?

Accepted Answer

A)   second: s
B)   kilogram: kg
C)   kelvin: K
D)   mole: m
E)   ampere: AF) A) and D)
G) A) and C)

Question 5

Select the best statement.

Accepted Answer

A)   Chemical changes provide the only valid basis for identification of a substance.
B)   Chemical changes are easily reversed by altering the temperature of the system.
C)   Chemical changes always produce substances different from the starting materials.
D)   Chemical changes are associated primarily with extensive properties.
E)   Chemical changes are accompanied by changes in the total mass of the substances involved.F) B) and E)
G) C) and D)

Question 6

Acetic acid boils at 244.2°F. What is its boiling point in degrees Celsius?

Accepted Answer

A)   382.0°C
B)   167.7°C
C)   153.4°C
D)   117.9°C
E)   103.7°CF) All of the above
G) A) and C)

Question 7

At a pressure of one billionth (10-9)  of atmospheric pressure, there are about 2.7 × 1010 molecules in one cubic centimeter of a gas. How many molecules is this per cubic meter?

Accepted Answer

A)   2.7 × 1016
B)   2.7 × 1014
C)   2.7 × 1012
D)   2.7 × 108
E)   2.7 × 104F) A) and D)
G) A) and C)

Question 8

The number 6.0448, rounded to 2 decimal places, becomes 6.05.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following is a chemical change?

Accepted Answer

A)   boiling of water
B)   melting wax
C)   broiling a steak on a grill
D)   condensing water vapor into rainfall
E)   carving a piece of woodF) A) and E)
G) B) and E)

Question 10

The ripening of fruit, once picked, is an example of physical change.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following correctly expresses 52,030.2 m in scientific notation?

Accepted Answer

A)   5.20302 × 104 m
B)   5.20302 × 105 m
C)   5.203 × 104 m
D)   5.20 × 104 m
E)   5.2 × 104 mF) A) and B)
G) A) and C)

Question 12

A scientist made careful measurements of the pressure and temperature of many different gases. Based on these measurements, he concluded that "the pressure of a fixed amount of gas, measured at constant volume, is directly proportional to its absolute temperature." This statement is best described as a

Accepted Answer

A)   theory.
B)   hypothesis.
C)   law.
D)   experiment.
E)   definition.F) B) and C)
G) A) and C)

Question 13

Select the answer that expresses the result of this calculation with the correct number of significant figures.

Accepted Answer

A)   13.3568
B)   13.357
C)   13.36
D)   13.4
E)   13F) A) and C)
G) B) and C)

Question 14

A large pizza has a diameter of 15 inches. Express this diameter in centimeters.

Accepted Answer

A)   38 cm
B)   24 cm
C)   18 cm
D)   9.3 cm
E)   5.9 cmF) All of the above
G) None of the above

Question 15

The appropriate number of significant figures in the result of 15.234 × 15.208 is

Accepted Answer

A)   2.
B)   3.
C)   4.
D)   5.
E)   6.F) C) and D)
G) None of the above

Question 16

If the price of gold at the morning fixing in London was $5310 per lb, what would a kilogram of gold have cost in £ (pounds) ? (Assume an exchange rate of $1.00 = £0.545)

Accepted Answer

A)   £1310
B)   £3510
C)   £6370
D)   £10400
E)   £17100F) A) and D)
G) A) and E)

Question 17

Which of the following is not an SI base unit?

Accepted Answer

A)   meter
B)   ampere
C)   second
D)   gram
E)   kelvinF) A) and B)
G) A) and C)

Question 18

The distance between carbon atoms in ethylene is 134 picometers. Which of the following expresses that distance in meters?

Accepted Answer

A)   1.34 × 10-13 m
B)   1.34 × 10-12 m
C)   1.34 × 10-10 m
D)   1.34 × 10-7 m
E)   1.34 × 10-6 mF) B) and E)
G) A) and C)

Question 19

The density of mercury, the only metal to exist as a liquid at room temperature, is 13.6 g/cm3. What is that density in pounds per cubic inch?

Accepted Answer

A)   849 lb/in3
B)   491 lb/in3
C)   376 lb/in3
D)   0.491 lb/in3
E)   1.83 × 10-3 lb/in3F) C) and D)
G) A) and E)

Question 20

In an average year, the American chemical industry produces more than 9.5 million metric tons of sodium carbonate. Over half of this is used in the manufacture of glass while another third is used in the production of detergents and other chemicals. How many pounds of sodium carbonate are produced annually?

Accepted Answer

A)   2.1 × 1010 lb
B)   4.3 × 109 lb
C)   1.1 × 107 lb
D)   2.2 × 106 lb
E)   2.1 × 104 lbF) A) and B)
G) A) and C)

Exam 1: Keys to Studying Chemistry Definitions, Units, and Problem Solving

A student makes several measurements of the density of an unknown mineral sample. She then reports the average value of these measurements. The number of significant figures she uses in her result should be a measure of its

Correct Answer
verified

A large pizza has a diameter of 15 inches. Express this diameter in centimeters.

Correct Answer
verified

Which of the following is a chemical change?

Correct Answer
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The density of mercury, the only metal to exist as a liquid at room temperature, is 13.6 g/cm³. What is that density in pounds per cubic inch?

Correct Answer
verified

Correct Answer
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Acetic acid boils at 244.2°F. What is its boiling point in degrees Celsius?

Correct Answer
verified

Which of the following correctly expresses 52,030.2 m in scientific notation?

Correct Answer
verified

The speed needed to escape the pull of Earth's gravity is 11.3 km/s. What is this speed in mi/h?

Correct Answer
verified

Which of the following is not an SI base unit?

Correct Answer
verified

The number 6.0448, rounded to 2 decimal places, becomes 6.05.

Correct Answer
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Which of the following abbreviations of the given SI base unit is incorrect?

Correct Answer
verified

If the price of gold at the morning fixing in London was $5310 per lb, what would a kilogram of gold have cost in £ (pounds) ? (Assume an exchange rate of $1.00 = £0.545)

Correct Answer
verified

At a pressure of one billionth (10^-9) of atmospheric pressure, there are about 2.7 × 10¹⁰ molecules in one cubic centimeter of a gas. How many molecules is this per cubic meter?

Correct Answer
verified

The distance between carbon atoms in ethylene is 134 picometers. Which of the following expresses that distance in meters?

Correct Answer
verified

Correct Answer
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The ripening of fruit, once picked, is an example of physical change.

Correct Answer
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The appropriate number of significant figures in the result of 15.234 × 15.208 is

Correct Answer
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Select the answer that expresses the result of this calculation with the correct number of significant figures.

Correct Answer
verified

During the swing of a frictionless pendulum, what energy form(s) remain constant?

Correct Answer
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Select the best statement.

Correct Answer
verified

Exam 1: Keys to Studying Chemistry Definitions, Units, and Problem Solving

A student makes several measurements of the density of an unknown mineral sample. She then reports the average value of these measurements. The number of significant figures she uses in her result should be a measure of its

Correct AnswerverifiedShow Answer

A large pizza has a diameter of 15 inches. Express this diameter in centimeters.

Correct AnswerverifiedShow Answer

Which of the following is a chemical change?

Correct AnswerverifiedShow Answer

The density of mercury, the only metal to exist as a liquid at room temperature, is 13.6 g/cm3. What is that density in pounds per cubic inch?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Acetic acid boils at 244.2°F. What is its boiling point in degrees Celsius?

Correct AnswerverifiedShow Answer

Which of the following correctly expresses 52,030.2 m in scientific notation?

Correct AnswerverifiedShow Answer

The speed needed to escape the pull of Earth's gravity is 11.3 km/s. What is this speed in mi/h?

Correct AnswerverifiedShow Answer

Which of the following is not an SI base unit?

Correct AnswerverifiedShow Answer

The number 6.0448, rounded to 2 decimal places, becomes 6.05.

Correct AnswerverifiedShow Answer

Which of the following abbreviations of the given SI base unit is incorrect?

Correct AnswerverifiedShow Answer

If the price of gold at the morning fixing in London was $5310 per lb, what would a kilogram of gold have cost in £ (pounds) ? (Assume an exchange rate of $1.00 = £0.545)

Correct AnswerverifiedShow Answer

At a pressure of one billionth (10-9) of atmospheric pressure, there are about 2.7 × 1010 molecules in one cubic centimeter of a gas. How many molecules is this per cubic meter?

Correct AnswerverifiedShow Answer

The distance between carbon atoms in ethylene is 134 picometers. Which of the following expresses that distance in meters?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The ripening of fruit, once picked, is an example of physical change.

Correct AnswerverifiedShow Answer

The appropriate number of significant figures in the result of 15.234 × 15.208 is

Correct AnswerverifiedShow Answer

Select the answer that expresses the result of this calculation with the correct number of significant figures.

Correct AnswerverifiedShow Answer

During the swing of a frictionless pendulum, what energy form(s) remain constant?

Correct AnswerverifiedShow Answer

Select the best statement.

Correct AnswerverifiedShow Answer

Correct Answer
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The density of mercury, the only metal to exist as a liquid at room temperature, is 13.6 g/cm³. What is that density in pounds per cubic inch?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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At a pressure of one billionth (10^-9) of atmospheric pressure, there are about 2.7 × 10¹⁰ molecules in one cubic centimeter of a gas. How many molecules is this per cubic meter?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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