Question 1

A concise verbal or mathematical statement of a relationship between phenomena that is always the same under the same conditions is referred to as

Accepted Answer

A)  a hypothesis. 
B)  a law. 
C)  a theory. 
D)  none of the above. 
A)  a hypothesis. 
B)  a law. 
C)  a theory. 
D)  none of the above. B

Question 2

Radio waves travel at the speed of light, which is 3.00 * 108 m/s. How many minutes does it take for a radio message to reach Earth from Saturn if Saturn is 7.9 * 108 km from Earth

Accepted Answer

A)  4.4 * 10-2 min 
B)  1.6 * 105 min 
C)  4.0 * 1015 min 
D)  44 min 
E)  2.6 min 
A)  4.4 * 10-2 min 
B)  1.6 * 105 min 
C)  4.0 * 1015 min 
D)  44 min 
E)  2.6 min D

Question 3

Complete the following sentence. A scientific law is

Accepted Answer

A)  a tentative explanation for a set of observations that can be tested by further experimentation. 
B) a statement describing a relationship between phenomena that is always the same under the same conditions. 
C)  a unifying principle that explains a body of facts and relations. 
D)  a model used to visualize the invisible. 
A)  a tentative explanation for a set of observations that can be tested by further experimentation. 
B) a statement describing a relationship between phenomena that is always the same under the same conditions. 
C)  a unifying principle that explains a body of facts and relations. 
D)  a model used to visualize the invisible. B

Question 4

Give the correct number of significant figures and units to the problem below. 5.46 m3/ 2.01 m2 =

Accepted Answer

A)  2.72 m5 
B)  2.72 m3 
C)  2.72 m2 
D)  2.72 m 
E)  2.72 m-1 
A)  2.72 m5 
B)  2.72 m3 
C)  2.72 m2 
D)  2.72 m 
E)  2.72 m-1

Question 5

An archeologist finds a huge monolith in the desert. In order to estimate the weight of this object; he estimates the dimensions of the monolith and removes some chips from the rock with his hammer, collecting the following data:
Dimensions of the monolith = 1.5 m * 5.2 m * 13 m
Mass of rock chips = 41.73 g
Volume of rock chips = 15.2 cm3
Determine the mass of the monolith in pounds, assuming it is of uniform composition. (1 lb = 453.6 g)

Accepted Answer

A)  5.9 * 105 lb 
B)  6.1 * 105 lb 
C)  6.3 * 105 lb 
D)  6.5 * 105 lb 
E)  None of the above 
A)  5.9 * 105 lb 
B)  6.1 * 105 lb 
C)  6.3 * 105 lb 
D)  6.5 * 105 lb 
E)  None of the above

Question 6

A runner averages 8 minutes and 25 seconds per mile. What is her average velocity in miles per hour

Accepted Answer

A)  7.27 mi/hr 
B)  7.13 mi/hr 
C)  8.42 mi/hr 
D)  4.36 mi/hr 
E)  0.140 mi/hr 
A)  7.27 mi/hr 
B)  7.13 mi/hr 
C)  8.42 mi/hr 
D)  4.36 mi/hr 
E)  0.140 mi/hr

Question 7

What is the density of a salt solution if 75.0 mL of the solution has a mass of 32.0 g

Accepted Answer

A)  0.127 g/mL 
B)  0.227 g/mL 
C)  0.327 g/mL 
D)  0.427 g/mL 
E)  None of the above 
A)  0.127 g/mL 
B)  0.227 g/mL 
C)  0.327 g/mL 
D)  0.427 g/mL 
E)  None of the above

Question 8

Convert 5.00 x 102 milliliters to quarts. (1L = 1.06 qt)

Accepted Answer

A)  1.88 qt 
B)  0.472 qt 
C)  0.528 qt 
D)  4.72 * 105 qt 
E)  5.28 * 105 qt 
A)  1.88 qt 
B)  0.472 qt 
C)  0.528 qt 
D)  4.72 * 105 qt 
E)  5.28 * 105 qt

Question 9

Express the number 26.7 in scientific notation.

Accepted Answer

A)  2.67 * 10-2 
B)  2.67 * 10-1 
C)  2.67 * 101 
D)  2.67 * 102 
E)  26.7 is already written in scientific notation 
A)  2.67 * 10-2 
B)  2.67 * 10-1 
C)  2.67 * 101 
D)  2.67 * 102 
E)  26.7 is already written in scientific notation

Question 10

Which of the following speeds is the greatest (1 mile = 1609 m)

Accepted Answer

A)  40 mi/h 
B)  2.0 * 105 mm/min 
C)  40 km/h 
D)  0.74 km/min 
E)  400 m/min 
A)  40 mi/h 
B)  2.0 * 105 mm/min 
C)  40 km/h 
D)  0.74 km/min 
E)  400 m/min

Question 11

The density of lead is 11.4 g/cm3 at 25$\circ$C. Calculate the volume occupied by 25.0 g of lead.

Accepted Answer

A)  2.19 cm3 
B)  0.456 cm3 
C)  285 cm3 
D)  1.24 cm3 
E)  6.05 cm3 
A)  2.19 cm3 
B)  0.456 cm3 
C)  285 cm3 
D)  1.24 cm3 
E)  6.05 cm3

Question 12

A cyclist averages 18.5 miles per hour. How many minutes will it take for him to complete a 125 kilometer race

Accepted Answer

A)  252 min 
B)  652 min 
C)  420 min 
D)  1440 min 
E)  405 min 
A)  252 min 
B)  652 min 
C)  420 min 
D)  1440 min 
E)  405 min

Question 13

The SI base unit of time is the hour.

Accepted Answer

A) True 
 B)False

Question 14

An investor paid market price for a chunk of gold that he was told was pure. The gold bar had a mass of 440 g, but was slightly irregular so an exact volume could not be calculated. The investor filled a large graduated cylinder with water, immersed the chunk of gold, and observed an increase in the apparent volume of material in the graduated cylinder of 25.0 mL. Pure gold has a density of 19.3 g/cm3. What is the density of the investor's chunk of gold

Accepted Answer

A)  17.9 g/cm3 
B)  17.6 g/cm3 
C)  17.4 g/cm3 
D)  17.1 g/cm3 
E)  None of the above 
A)  17.9 g/cm3 
B)  17.6 g/cm3 
C)  17.4 g/cm3 
D)  17.1 g/cm3 
E)  None of the above

Question 15

The number 0.07010 contains four significant figures.

Accepted Answer

A) True 
 B)False

Question 16

Radio waves travel at the speed of light, which is 3.00 * 108 m/s. How many kilometers will radio messages travel in exactly one year

Accepted Answer

A)  9.46 * 1015 km 
B)  7.30 * 108 km 
C)  7.10 * 1010 km 
D)  9.46 * 1012 km 
E)  3.33 * 10-3 km 
A)  9.46 * 1015 km 
B)  7.30 * 108 km 
C)  7.10 * 1010 km 
D)  9.46 * 1012 km 
E)  3.33 * 10-3 km

Question 17

The average distance from Earth to the sun is 9.3 * 107 miles. How many kilometers is this

Accepted Answer

A)  1.5 * 108 km 
B)  1.5 * 105 km 
C)  5.6 * 107 km 
D)  1.7 * 10-8 km 
E)  1.5 * 1011 km 
A)  1.5 * 108 km 
B)  1.5 * 105 km 
C)  5.6 * 107 km 
D)  1.7 * 10-8 km 
E)  1.5 * 1011 km

Question 18

Length is an intensive property.

Accepted Answer

A) True 
 B)False

Question 19

In 1828, the diameter of the U.S. dime was changed to approximately 18 mm. What is this diameter when expressed in nanometers

Accepted Answer

A)  1.8 * 109 nm 
B)  1.8 * 107 nm 
C)  1.8 * 101 nm 
D)  1.8 * 10-5 nm 
E)  1.8 * 10-10 nm 
A)  1.8 * 109 nm 
B)  1.8 * 107 nm 
C)  1.8 * 101 nm 
D)  1.8 * 10-5 nm 
E)  1.8 * 10-10 nm

Question 20

Which of the following is an example of a physical property

Accepted Answer

A)  corrosiveness of sulfuric acid 
B)  toxicity of cyanide 
C)  flammability of gasoline 
D)  neutralization of stomach acid with an antacid 
E)  lead becomes a liquid when heated to 601oC 
A)  corrosiveness of sulfuric acid 
B)  toxicity of cyanide 
C)  flammability of gasoline 
D)  neutralization of stomach acid with an antacid 
E)  lead becomes a liquid when heated to 601oC

Exam 1: Chemistry: The Study of Change

A concise verbal or mathematical statement of a relationship between phenomena that is always the same under the same conditions is referred to as

Radio waves travel at the speed of light, which is 3.00 * 108 m/s. How many minutes does it take for a radio message to reach Earth from Saturn if Saturn is 7.9 * 108 km from Earth

Complete the following sentence. A scientific law is

Give the correct number of significant figures and units to the problem below. 5.46 m3/ 2.01 m2 =

A runner averages 8 minutes and 25 seconds per mile. What is her average velocity in miles per hour

What is the density of a salt solution if 75.0 mL of the solution has a mass of 32.0 g

Convert 5.00 x 102 milliliters to quarts. (1L = 1.06 qt)

Express the number 26.7 in scientific notation.

Which of the following speeds is the greatest (1 mile = 1609 m)

The density of lead is 11.4 g/cm3 at 25 ∘\circ∘ C. Calculate the volume occupied by 25.0 g of lead.

A cyclist averages 18.5 miles per hour. How many minutes will it take for him to complete a 125 kilometer race

The SI base unit of time is the hour.

The number 0.07010 contains four significant figures.

Radio waves travel at the speed of light, which is 3.00 * 108 m/s. How many kilometers will radio messages travel in exactly one year

The average distance from Earth to the sun is 9.3 * 107 miles. How many kilometers is this

Length is an intensive property.

In 1828, the diameter of the U.S. dime was changed to approximately 18 mm. What is this diameter when expressed in nanometers

Which of the following is an example of a physical property

Atoms Molecules and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Hybridization of Atomic

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metals Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

Radio waves travel at the speed of light, which is 3.00 * 10⁸ m/s. How many minutes does it take for a radio message to reach Earth from Saturn if Saturn is 7.9 * 10⁸ km from Earth

Give the correct number of significant figures and units to the problem below. 5.46 m³/ 2.01 m² =

Convert 5.00 x 10² milliliters to quarts. (1L = 1.06 qt)

The density of lead is 11.4 g/cm³ at 25^$\circ$C. Calculate the volume occupied by 25.0 g of lead.

Radio waves travel at the speed of light, which is 3.00 * 10⁸ m/s. How many kilometers will radio messages travel in exactly one year

The average distance from Earth to the sun is 9.3 * 10⁷ miles. How many kilometers is this