Question 1

What is 2.1 × 10-5 written in decimal notation?

Accepted Answer

A) 2,100,000 
B) 210,000 
C) 210 
D) 0.00021 
E) 0.000021 
A) 2,100,000 
B) 210,000 
C) 210 
D) 0.00021 
E) 0.000021

Question 2

Why is the number 32 (and not some other value)used in the formula for converting between Celsius and Fahrenheit temperatures?

Accepted Answer

The 32 compensates for the fac

Question 3

125 cL is the same as all of these except

Accepted Answer

A) 125 centiliter. 
B) 125 cubic liter. 
C) 1.25 liter. 
D) 1250 milliliter. 
E) 12.5 deciliter. 
A) 125 centiliter. 
B) 125 cubic liter. 
C) 1.25 liter. 
D) 1250 milliliter. 
E) 12.5 deciliter.

Question 4

What is the area of a piece of metal foil that measures 43.9 cm by 29.21 cm? Express the answer to the correct number of significant figures.

Accepted Answer

A) 128 cm2 
B) 1280 cm2 
C) 1282.3 cm2 
D) 1282.32 cm2 
E) 1282.319 cm2 
A) 128 cm2 
B) 1280 cm2 
C) 1282.3 cm2 
D) 1282.32 cm2 
E) 1282.319 cm2

Question 5

What is the chemical symbol for chromium?

Accepted Answer

A) C 
B) Ca 
C) Cl 
D) Cr 
E) Cu 
A) C 
B) Ca 
C) Cl 
D) Cr 
E) Cu

Question 6

A chemical reaction occurs when

Accepted Answer

A) a substance's structure is altered. 
B) a substance is heated. 
C) two or more substances are mixed. 
D) a substance is dissolved in water. 
E) all of the above 
A) a substance's structure is altered. 
B) a substance is heated. 
C) two or more substances are mixed. 
D) a substance is dissolved in water. 
E) all of the above

Question 7

Which is an example of matter?

Accepted Answer

A) electrical current 
B) conductivity 
C) reactivity 
D) plastic 
E) anxiety 
A) electrical current 
B) conductivity 
C) reactivity 
D) plastic 
E) anxiety

Question 8

Which choice best describes the degree of uncertainty in the measurement 16.30 g?

Accepted Answer

A) The uncertainty cannot be determined without additional information. 
B) The quantity is exact. 
C) ±1.00 g 
D) ±0.10 g 
E) ±0.01 g 
A) The uncertainty cannot be determined without additional information. 
B) The quantity is exact. 
C) ±1.00 g 
D) ±0.10 g 
E) ±0.01 g

Question 9

95.0°F is the same as

Accepted Answer

A) 21°C. 
B) 35°C. 
C) 85°C. 
D) 171°C. 
E) 203°C. 
A) 21°C. 
B) 35°C. 
C) 85°C. 
D) 171°C. 
E) 203°C.

Question 10

What is 0.0970 written in scientific notation?

Accepted Answer

A) 970 × 10-4 
B) 97 × 10-3 
C) 9.70 × 10-2 
D) 97.0 × 10-2 
E) 0.97 × 10-1 
A) 970 × 10-4 
B) 97 × 10-3 
C) 9.70 × 10-2 
D) 97.0 × 10-2 
E) 0.97 × 10-1

Question 11

What is the numerical value of (8.0 × 103)(2.0 × 102)?

Accepted Answer

A) 16.0 
B) 16 × 106 
C) 1.6 × 106 
D) 1.6 × 105 
E) 1.6 × 101 
A) 16.0 
B) 16 × 106 
C) 1.6 × 106 
D) 1.6 × 105 
E) 1.6 × 101

Question 12

What is the numerical value of 1.2 × 1.222? Express your answer using the correct number of significant figures.

Accepted Answer

A) 1.5 
B) 1.47 
C) 1.466 
D) 1.4664 
E) none of the above 
A) 1.5 
B) 1.47 
C) 1.466 
D) 1.4664 
E) none of the above

Question 13

The conversion factor used to convert 15.0 inches to cm is

Accepted Answer

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

Question 14

The number 5.320 × 102 in conventional notation is

Accepted Answer

A) 532.0. 
B) 53.20. 
C) 5.320. 
D) 0.5320. 
E) 0.005320. 
A) 532.0. 
B) 53.20. 
C) 5.320. 
D) 0.5320. 
E) 0.005320.

Question 15

A 2.36 cm3 sample of an unknown metal weighs 18.5 g.What is the sample's density?

Accepted Answer

A) 7.84 g/cm3 
B) 0.127 cm3/g 
C) 15.75 g /cm3 
D) 0.784 g/cm3 
A) 7.84 g/cm3 
B) 0.127 cm3/g 
C) 15.75 g /cm3 
D) 0.784 g/cm3

Question 16

How many pounds are contained in 84.0 kg?

Accepted Answer

A) 0.038 lb 
B) 0.084 lb 
C) 38.0 lb 
D) 185 lb 
E) 380 lb 
A) 0.038 lb 
B) 0.084 lb 
C) 38.0 lb 
D) 185 lb 
E) 380 lb

Question 17

A chemist is given an unknown sample.Which of her observations is not a physical property?

Accepted Answer

A) The sample is a colorless liquid. 
B) The sample has an odor similar to gasoline. 
C) The sample is flammable. 
D) The sample size is 55 mL. 
E) The density of the liquid is 0.789 g/mL. 
A) The sample is a colorless liquid. 
B) The sample has an odor similar to gasoline. 
C) The sample is flammable. 
D) The sample size is 55 mL. 
E) The density of the liquid is 0.789 g/mL.

Question 18

What is the numerical value of  
? Express your answer using the correct number of significant figures.

Accepted Answer

A) 10-3 
B) 1 × 10-3 
C) 1.2 × 10-3 
D) 1.23 × 10-3 
E) 1.227 × 10-3 
A) 10-3 
B) 1 × 10-3 
C) 1.2 × 10-3 
D) 1.23 × 10-3 
E) 1.227 × 10-3

Question 19

How many centimeters are contained in 12.5 inches?

Accepted Answer

A) 4.92 cm 
B) 5.10 cm 
C) 31.8 cm 
D) 492 cm 
E) none of the above 
A) 4.92 cm 
B) 5.10 cm 
C) 31.8 cm 
D) 492 cm 
E) none of the above

Question 20

Which of the following statements is true of specific gravity?

Accepted Answer

A) It has the units of g/cm3 
B) Specific gravity is constant at any temperature. 
C) Specific gravity is unitless because it is the density of one substance divided by the density of water. 
D) Specific gravity is a measure of the reactivity index of a substance. 
A) It has the units of g/cm3 
B) Specific gravity is constant at any temperature. 
C) Specific gravity is unitless because it is the density of one substance divided by the density of water. 
D) Specific gravity is a measure of the reactivity index of a substance.

Exam 1: Matter and Measurements

What is 2.1 × 10-5 written in decimal notation?

Why is the number 32 (and not some other value)used in the formula for converting between Celsius and Fahrenheit temperatures?

125 cL is the same as all of these except

What is the area of a piece of metal foil that measures 43.9 cm by 29.21 cm? Express the answer to the correct number of significant figures.

What is the chemical symbol for chromium?

A chemical reaction occurs when

Which is an example of matter?

Which choice best describes the degree of uncertainty in the measurement 16.30 g?

95.0°F is the same as

What is 0.0970 written in scientific notation?

What is the numerical value of (8.0 × 103)(2.0 × 102)?

What is the numerical value of 1.2 × 1.222? Express your answer using the correct number of significant figures.

The conversion factor used to convert 15.0 inches to cm is

The number 5.320 × 102 in conventional notation is

A 2.36 cm3 sample of an unknown metal weighs 18.5 g.What is the sample's density?

How many pounds are contained in 84.0 kg?

A chemist is given an unknown sample.Which of her observations is not a physical property?

What is the numerical value of ? Express your answer using the correct number of significant figures.

How many centimeters are contained in 12.5 inches?

Which of the following statements is true of specific gravity?

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

What is 2.1 × 10^-5 written in decimal notation?

What is the numerical value of (8.0 × 10³)(2.0 × 10²)?

The number 5.320 × 10² in conventional notation is

A 2.36 cm³ sample of an unknown metal weighs 18.5 g.What is the sample's density?