Question 1

How long is 1 cm?

Accepted Answer

A) 0.01 mm 
B) 1 mm 
C) 10 mm 
D) 100 mm 
A) 0.01 mm 
B) 1 mm 
C) 10 mm 
D) 100 mm

Question 2

List and describe two differences between pure substances and mixtures.

Accepted Answer

1.The composition of a pure substance is

Question 3

The formula for sodium carbonate,Na2CO3,represents a compound composed of

Accepted Answer

A) two atoms of sodium,three atoms of carbon,and three atoms of oxygen. 
B) two atoms of sodium,one atom of carbon,and three atoms of oxygen. 
C) six atoms of sodium,two atoms of carbon,and six atoms of oxygen. 
D) one atom of sodium and one atom of carbonate. 
E) two atoms of sodium and three atoms of carbonate. 
A) two atoms of sodium,three atoms of carbon,and three atoms of oxygen. 
B) two atoms of sodium,one atom of carbon,and three atoms of oxygen. 
C) six atoms of sodium,two atoms of carbon,and six atoms of oxygen. 
D) one atom of sodium and one atom of carbonate. 
E) two atoms of sodium and three atoms of carbonate.

Question 4

Caffeine,the active ingredient in coffee,is composed of eight atoms of carbon,ten atoms of hydrogen,and four atoms of nitrogen.The chemical formula of caffeine is written

Accepted Answer

A) CHNO 
B) C8H10N4O2 
C) C8H10N4 
D) C8H12N4O4 
E) C8H10N4O 
A) CHNO 
B) C8H10N4O2 
C) C8H10N4 
D) C8H12N4O4 
E) C8H10N4O

Question 5

In scientific notation,the number 185,000,000 is

Accepted Answer

A) 185 × 106. 
B) 1.85 × 106. 
C) 1.85 × 108. 
D) 185 × 10-8. 
E) 1.85 × 10-8. 
A) 185 × 106. 
B) 1.85 × 106. 
C) 1.85 × 108. 
D) 185 × 10-8. 
E) 1.85 × 10-8.

Question 6

Which choice best describes the degree of uncertainty in the measurement 4.0032 g?

Accepted Answer

A) The uncertainty cannot be determined without additional information. 
B) The quantity is exact. 
C) The measurement is between 4.002 and 4.004 g. 
D) The measurement is between 4.0031 and 4.0033 g. 
E) The measurement is between 3.99 and 4.01 g. 
A) The uncertainty cannot be determined without additional information. 
B) The quantity is exact. 
C) The measurement is between 4.002 and 4.004 g. 
D) The measurement is between 4.0031 and 4.0033 g. 
E) The measurement is between 3.99 and 4.01 g.

Question 7

Which chemical symbol represents a metalloid?

Accepted Answer

A) Al 
B) B 
C) Ga 
D) Zn 
E) Ar 
A) Al 
B) B 
C) Ga 
D) Zn 
E) Ar

Question 8

What is the total length of two pieces of rubber tubing which are 7.69 cm and 4.028 cm in length? Express this answer to the correct number of significant figures.

Accepted Answer

A) 11.7 cm 
B) 11.69 cm 
C) 11.718 cm 
D) 11.72 cm 
E) 12 cm 
A) 11.7 cm 
B) 11.69 cm 
C) 11.718 cm 
D) 11.72 cm 
E) 12 cm

Question 9

How many centimeters are there in one kilometer?

Accepted Answer

A) 105 cm 
B) 102 cm 
C) 101 cm 
D) 10-2 cm 
E) 10-5 cm 
A) 105 cm 
B) 102 cm 
C) 101 cm 
D) 10-2 cm 
E) 10-5 cm

Question 10

The abbreviation for the metric unit used to measure mass is

Accepted Answer

A) g 
B) g/cm3 
C) K 
D) L 
E) m 
A) g 
B) g/cm3 
C) K 
D) L 
E) m

Question 11

Which of the following is a physical change?

Accepted Answer

A) the rusting of iron 
B) the condensation of water vapor 
C) the baking of a potato 
D) the explosion of nitroglycerin 
A) the rusting of iron 
B) the condensation of water vapor 
C) the baking of a potato 
D) the explosion of nitroglycerin

Question 12

The metric unit used to measure volume is the

Accepted Answer

A) gram. 
B) gram per cubic centimeter. 
C) Kelvin. 
D) liter. 
E) meter. 
A) gram. 
B) gram per cubic centimeter. 
C) Kelvin. 
D) liter. 
E) meter.

Question 13

In a density determination,a student measured 11.46 mL of a liquid.How many liters is this?

Accepted Answer

A) 11,460 L 
B) 1.146 L 
C) 0.1146 L 
D) 0.01146 L 
E) 1.146 ×
 
L 
A) 11,460 L 
B) 1.146 L 
C) 0.1146 L 
D) 0.01146 L 
E) 1.146 ×
 
L

Question 14

How many quarts are contained in 450.mL?

Accepted Answer

A) 0.426 quart 
B) 2.10 quarts 
C) 426 quarts 
D) 475 quarts 
E) 0.475 quarts 
A) 0.426 quart 
B) 2.10 quarts 
C) 426 quarts 
D) 475 quarts 
E) 0.475 quarts

Question 15

What is the numerical value of  
?

Accepted Answer

A) 0.125 
B) 1.25 × 10-5 
C) 1.25 × 10-4 
D) 1.25 × 104 
E) 1.25 × 105 
A) 0.125 
B) 1.25 × 10-5 
C) 1.25 × 10-4 
D) 1.25 × 104 
E) 1.25 × 105

Question 16

If 75.0 g of water at 30.0°C absorbs 900 calories,the new temperature will be

Accepted Answer

A) 18.0°C. 
B) 22.0°C. 
C) 42.0°C. 
D) 105°C. 
E) 160°C. 
A) 18.0°C. 
B) 22.0°C. 
C) 42.0°C. 
D) 105°C. 
E) 160°C.

Question 17

Which of the following is a physical property of aspirin?

Accepted Answer

A) Aspirin can moderate some heart disorders when ingested. 
B) Aspirin does not decompose when tightly sealed in a bottle. 
C) Aspirin yields carbon dioxide and water vapor when burned. 
D) Aspirin can be pressed into tablets when mixed with cornstarch. 
E) Aspirin reacts with water to produce salicylic acid and acetic acid. 
A) Aspirin can moderate some heart disorders when ingested. 
B) Aspirin does not decompose when tightly sealed in a bottle. 
C) Aspirin yields carbon dioxide and water vapor when burned. 
D) Aspirin can be pressed into tablets when mixed with cornstarch. 
E) Aspirin reacts with water to produce salicylic acid and acetic acid.

Question 18

Which of the following is a mixture?

Accepted Answer

A) cough syrup 
B) iron 
C) helium 
D) sodium hydrogen carbonate 
E) steam 
A) cough syrup 
B) iron 
C) helium 
D) sodium hydrogen carbonate 
E) steam

Question 19

Why is the number 273.15 (and not some other value)used in the formula for converting between Celsius and Kelvin temperatures?

Accepted Answer

This value compensates for the fact that

Question 20

Why is the number 1.8 (and not some other value)used in the formula for converting between Celsius and Fahrenheit temperatures?

Accepted Answer

This value compensates for the different

Exam 1: Matter and Measurements

How long is 1 cm?

List and describe two differences between pure substances and mixtures.

The formula for sodium carbonate,Na2CO3,represents a compound composed of

Caffeine,the active ingredient in coffee,is composed of eight atoms of carbon,ten atoms of hydrogen,and four atoms of nitrogen.The chemical formula of caffeine is written

In scientific notation,the number 185,000,000 is

Which choice best describes the degree of uncertainty in the measurement 4.0032 g?

Which chemical symbol represents a metalloid?

What is the total length of two pieces of rubber tubing which are 7.69 cm and 4.028 cm in length? Express this answer to the correct number of significant figures.

How many centimeters are there in one kilometer?

The abbreviation for the metric unit used to measure mass is

Which of the following is a physical change?

The metric unit used to measure volume is the

In a density determination,a student measured 11.46 mL of a liquid.How many liters is this?

How many quarts are contained in 450.mL?

What is the numerical value of ?

If 75.0 g of water at 30.0°C absorbs 900 calories,the new temperature will be

Which of the following is a physical property of aspirin?

Which of the following is a mixture?

Why is the number 273.15 (and not some other value)used in the formula for converting between Celsius and Kelvin temperatures?

Why is the number 1.8 (and not some other value)used in the formula for converting between Celsius and Fahrenheit temperatures?

Atoms and the Periodic Table

Ionic Compounds

Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Amines

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

The Generation of Biochemical Energy

Carbohydrates

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Protein and Amino Acid Metabolism

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

The formula for sodium carbonate,Na₂CO₃,represents a compound composed of