Question 1

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/in3 
A)  849 lb/in3 
B)  491 lb/in3 
C)  376 lb/in3 
D)  0.491 lb/in3 
E)  1.83 *10-3 lb/in3

Question 2

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 cm 
A)  38 cm 
B)  24 cm 
C)  18 cm 
D)  9.3 cm 
E)  5.9 cm

Question 3

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 m 
A)  5.20302 * 104 m 
B)  5.20302* 105 m 
C)  5.203 * 104 m 
D)  5.20 *104 m 
E)  5.2 * 104 m

Question 4

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, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of 1.00 g/cm3 at the temperature of the measurement.)

Accepted Answer

A)  1.992 g/cm3 
B)  1.840 g/cm3 
C)  1.729 g/cm3 
D)  1.598 g/cm3 
E)  0.543 g/cm3 
A)  1.992 g/cm3 
B)  1.840 g/cm3 
C)  1.729 g/cm3 
D)  1.598 g/cm3 
E)  0.543 g/cm3

Question 5

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 wood 
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 wood

Question 6

The numerical value of any temperature expressed in Celsius is always different from the numerical value of the same temperature in Fahrenheit.

Accepted Answer

A) True 
 B)False

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 *104 
A)  2.7 * 1016 
B)  2.7 * 1014 
C)  2.7 * 1012 
D)  2.7 * 108 
E)  2.7 *104

Question 8

If the density of a certain spherical atomic nucleus is 1.0 * 1014 g cm-3 and its mass is 2.0 * 10-23 g, what is its radius in cm?

Accepted Answer

A)  3.6 * 10-13 cm 
B)  2.0 *0 10-37 cm 
C)  4.8 * 10-38 cm 
D)  2.2 * 10-19 cm 
E)  None of these choices is correct. 
A)  3.6 * 10-13 cm 
B)  2.0 *0 10-37 cm 
C)  4.8 * 10-38 cm 
D)  2.2 * 10-19 cm 
E)  None of these choices is correct.

Question 9

Which measurement is expressed to 4 significant figures?

Accepted Answer

A)  0.423 kg 
B)  24.049 cm 
C)  1300 K 
D)  82,306 m 
E)  62.40 g 
A)  0.423 kg 
B)  24.049 cm 
C)  1300 K 
D)  82,306 m 
E)  62.40 g

Question 10

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

Question 11

Express 96,342 m using 2 significant figures.

Accepted Answer

A)  9.60 * 104 m 
B)  9.6 *104 m 
C)  9.60 * 10-4 m 
D)  9.6 *10-4 m 
E)  96,000. m 
A)  9.60 * 104 m 
B)  9.6 *104 m 
C)  9.60 * 10-4 m 
D)  9.6 *10-4 m 
E)  96,000. m

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

The S.I. unit of speed (velocity) is

Accepted Answer

A)  km/h 
B)  km/s 
C)  m/h 
D)  m/s 
E)  None of these choices is correct. 
A)  km/h 
B)  km/s 
C)  m/h 
D)  m/s 
E)  None of these choices is correct.

Question 14

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

Question 15

The weight of a coin measured as 1.96235 g on one balance is definitely more accurate than a weight measurement of 1.95 g on another balance.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following correctly shows how to convert a density of 20.1 g cm-3 to units of kg m-3?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 17

Give an example of a physical property and a chemical property of each of the following:
A) oxygen gas
B) octane
C) copper

Accepted Answer

Answers could all be the same,

Question 18

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 lb 
A)  2.1 * 1010 lb 
B)  4.3 * 109 lb 
C)  1.1 * 107 lb 
D)  2.2 * 106 lb 
E)  2.1 *104 lb

Question 19

- 5.98 is properly written as:

Accepted Answer

A)  0.06 
B)  0.056 
C)  0.0565 
D)  0.05646 
E)  0.056462 
A)  0.06 
B)  0.056 
C)  0.0565 
D)  0.05646 
E)  0.056462

Question 20

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 m 
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 m

Exam 1: Keys to the Study of Chemistry

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?

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

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

Which of the following is a chemical change?

The numerical value of any temperature expressed in Celsius is always different from the numerical value of the same temperature in Fahrenheit.

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?

If the density of a certain spherical atomic nucleus is 1.0 * 1014 g cm-3 and its mass is 2.0 * 10-23 g, what is its radius in cm?

Which measurement is expressed to 4 significant figures?

Express 96,342 m using 2 significant figures.

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

The S.I. unit of speed (velocity) is

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

The weight of a coin measured as 1.96235 g on one balance is definitely more accurate than a weight measurement of 1.95 g on another balance.

Which of the following correctly shows how to convert a density of 20.1 g cm-3 to units of kg m-3?

Give an example of a physical property and a chemical property of each of the following: A) oxygen gas B) octane C) copper

- 5.98 is properly written as:

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

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

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?

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?

If the density of a certain spherical atomic nucleus is 1.0 * 10¹⁴ g cm^-3 and its mass is 2.0 * 10^-23 g, what is its radius in cm?

Which of the following correctly shows how to convert a density of 20.1 g cm^-3 to units of kg m^-3?