Question 1

Which of the following is the greatest mass?

Accepted Answer

A) 1000 μg 
B) 1.000 × 10-4 kg 
C) 1.000 × 10-4 cg 
D) 1.000 × 10-8 mg 
A) 1000 μg 
B) 1.000 × 10-4 kg 
C) 1.000 × 10-4 cg 
D) 1.000 × 10-8 mg

Question 2

Oxygen is:

Accepted Answer

A) a mixture 
B) a compound 
C) an element 
D) a solution 
E) always combined with hydrogen 
A) a mixture 
B) a compound 
C) an element 
D) a solution 
E) always combined with hydrogen

Question 3

A student weighed 30.00 μg of sulfur in the lab.This is the same mass as:

Accepted Answer

A) 3.000 × 10-8 g 
B) 3.000 × 10-5 kg 
C) 3.000 × 10-5 mg 
D) 3.000 × 104 ng 
A) 3.000 × 10-8 g 
B) 3.000 × 10-5 kg 
C) 3.000 × 10-5 mg 
D) 3.000 × 104 ng

Question 4

What is the answer to the correct number of significant figures of the following calculation?

Accepted Answer

A) 7.6 
B) 7.57 
C) 7.58 
D) 7.578 
E) 7.582 
A) 7.6 
B) 7.57 
C) 7.58 
D) 7.578 
E) 7.582

Question 5

The average distance between nitrogen and oxygen atoms is 115 pm in a compound called nitric oxide.What is this distance in millimeters?

Accepted Answer

A) 1.15 × 10-8 mm 
B) 1.15 × 10-7 mm 
C) 1.15 × 1013 mm 
D) 1.15 × 1017 mm 
A) 1.15 × 10-8 mm 
B) 1.15 × 10-7 mm 
C) 1.15 × 1013 mm 
D) 1.15 × 1017 mm

Question 6

What mass,in g,of a solution containing 12% by mass sodium chloride is needed for a process that requires 8 g of sodium chloride?

Accepted Answer

A) 12 g 
B) 150 g 
C) 67 g 
D) 0.96 g 
E) 8 g 
A) 12 g 
B) 150 g 
C) 67 g 
D) 0.96 g 
E) 8 g

Question 7

A model that explains and makes predictions about natural phenomena is referred to as a:

Accepted Answer

A) natural law 
B) hypothesis 
C) theory 
D) generalization 
E) deduction 
A) natural law 
B) hypothesis 
C) theory 
D) generalization 
E) deduction

Question 8

Convert -41.0 °F to degrees Celsius.

Accepted Answer

A) -40.6 °C 
B) -57.6 °C 
C) -73.0 °C 
D) -9.0 °C 
E) -117 °C 
A) -40.6 °C 
B) -57.6 °C 
C) -73.0 °C 
D) -9.0 °C 
E) -117 °C

Question 9

Which of the following represents a base unit in the SI system of measurements?

Accepted Answer

A) m2  
B) kg 
C) g/cm3  
D) m/s 
E) liter 
A) m2  
B) kg 
C) g/cm3  
D) m/s 
E) liter

Question 10

Gasoline is an example of:

Accepted Answer

A) a compound 
B) an element 
C) a heterogeneous mixture 
D) a homogeneous mixture 
A) a compound 
B) an element 
C) a heterogeneous mixture 
D) a homogeneous mixture

Question 11

A 16.0 g sample of iron has a volume of 2.035 cm3.What is its density expressed to the correct number of significant figures?

Accepted Answer

A) 0.127 g/cm3  
B) 32.6 g/cm3  
C) 7.86 g/cm3  
D) 7.862 g/cm3  
E) 7.9 g/cm3  
A) 0.127 g/cm3  
B) 32.6 g/cm3  
C) 7.86 g/cm3  
D) 7.862 g/cm3  
E) 7.9 g/cm3

Question 12

Which of the following numbers has the greatest number of significant figures?

Accepted Answer

A) 0.5070 
B) 0.201 
C) 418000 
D) 6.02 × 1024 
A) 0.5070 
B) 0.201 
C) 418000 
D) 6.02 × 1024

Question 13

Saltwater is:

Accepted Answer

A) a mixture 
B) only one compound 
C) an element 
D) a molecule 
E) an atom 
A) a mixture 
B) only one compound 
C) an element 
D) a molecule 
E) an atom

Question 14

Using the proper number of significant figures,how should the answer to the multiplication of the measurements  
Be written?

Accepted Answer

A) 83.8148 
B) 83.8 
C) 83.81 
D) 83.815 
E) 83.82 
A) 83.8148 
B) 83.8 
C) 83.81 
D) 83.815 
E) 83.82

Question 15

Without doing a calculation,find which of the following represents the highest temperature.

Accepted Answer

A) 20 °F 
B) 0 °C 
C) 0 K 
D) 270 K 
E) 0 °F 
A) 20 °F 
B) 0 °C 
C) 0 K 
D) 270 K 
E) 0 °F

Question 16

Without using a calculator,solve the following problem:

Accepted Answer

A) 1 × 106 
B) 1 × 100 
C) 1 × 10-12 
D) 1 × 10-18 
A) 1 × 106 
B) 1 × 100 
C) 1 × 10-12 
D) 1 × 10-18

Question 17

Round off 00907506 to four significant figures.

Accepted Answer

A) 0091 
B) 9076 
C) 9100 
D) 9.075 × 105 
A) 0091 
B) 9076 
C) 9100 
D) 9.075 × 105

Question 18

Which statement is INCORRECT?

Accepted Answer

A) Natural laws are concise statements about natural phenomena. 
B) Induction is to infer a set of naturals laws from a set of observations. 
C) The key to the scientific method is valid assumptions. 
D) A hypothesis is a tentative explanation of a natural law. 
E) A pattern of thinking is known as a paradigm. 
A) Natural laws are concise statements about natural phenomena. 
B) Induction is to infer a set of naturals laws from a set of observations. 
C) The key to the scientific method is valid assumptions. 
D) A hypothesis is a tentative explanation of a natural law. 
E) A pattern of thinking is known as a paradigm.

Question 19

The mass of a single zinc atom is 1.086 × 10-22 g.This is the same mass as:

Accepted Answer

A) 1.086 × 10-16 mg 
B) 1.086 × 10-25 kg 
C) 1.086 × 10-28 μg 
D) 1.086 × 10-31 ng 
A) 1.086 × 10-16 mg 
B) 1.086 × 10-25 kg 
C) 1.086 × 10-28 μg 
D) 1.086 × 10-31 ng

Question 20

The scientific method is used to make theories that can no longer be changed.

Accepted Answer

A) True 
 B)False

Exam 1: Matter: Its Properties and Measurement

Which of the following is the greatest mass?

Oxygen is:

A student weighed 30.00 μg of sulfur in the lab.This is the same mass as:

What is the answer to the correct number of significant figures of the following calculation?

The average distance between nitrogen and oxygen atoms is 115 pm in a compound called nitric oxide.What is this distance in millimeters?

What mass,in g,of a solution containing 12% by mass sodium chloride is needed for a process that requires 8 g of sodium chloride?

A model that explains and makes predictions about natural phenomena is referred to as a:

Convert -41.0 °F to degrees Celsius.

Which of the following represents a base unit in the SI system of measurements?

Gasoline is an example of:

A 16.0 g sample of iron has a volume of 2.035 cm3.What is its density expressed to the correct number of significant figures?

Which of the following numbers has the greatest number of significant figures?

Saltwater is:

Using the proper number of significant figures,how should the answer to the multiplication of the measurements Be written?

Without doing a calculation,find which of the following represents the highest temperature.

Without using a calculator,solve the following problem:

Round off 00907506 to four significant figures.

Which statement is INCORRECT?

The mass of a single zinc atom is 1.086 × 10-22 g.This is the same mass as:

The scientific method is used to make theories that can no longer be changed.

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

A 16.0 g sample of iron has a volume of 2.035 cm³.What is its density expressed to the correct number of significant figures?

The mass of a single zinc atom is 1.086 × 10^-22 g.This is the same mass as: