Question 1

One calorie is the amount of energy needed to raise the temperature of one gram of water one degree Celsius.

Accepted Answer

A) True 
 B)False

Question 2

Air has an average density of 0.001226 g/mL.What volume of air would have a mass of 1.0 lb? [454 g = 1 pound]

Accepted Answer

A) 37 mL 
B) 370 mL 
C) 557 mL 
D) 2.7 × 10−6 mL 
E) 3.7 × 102 L 
A) 37 mL 
B) 370 mL 
C) 557 mL 
D) 2.7 × 10−6 mL 
E) 3.7 × 102 L

Question 3

What Fahrenheit temperature corresponds to -40.0°C?

Accepted Answer

A) -8°F 
B) 16.8°F 
C) -36.9°F 
D) -40.0°F 
E) -1.94°F 
A) -8°F 
B) 16.8°F 
C) -36.9°F 
D) -40.0°F 
E) -1.94°F

Question 4

Conversion of ice to liquid water or liquid water to steam is an example of what kind of change?

Accepted Answer

A) physical 
B) chemical 
C) molecular 
D) analytical 
E) Both physical and chemical are correct. 
A) physical 
B) chemical 
C) molecular 
D) analytical 
E) Both physical and chemical are correct.

Question 5

What are the two classes of pure substances?

Accepted Answer

A) elements and atoms 
B) compounds and molecules 
C) elements and compounds 
D) chemical and physical 
E) homogeneous and heterogeneous 
A) elements and atoms 
B) compounds and molecules 
C) elements and compounds 
D) chemical and physical 
E) homogeneous and heterogeneous

Question 6

A typical aspirin tablet contains 5.00 grains of pure aspirin analgesic compound.The rest of the tablet is starch.How many aspirin tablets can be made from 50.0 g of pure aspirin? [Use: 1.00 g = 15.4 grains]

Accepted Answer

A) 17 tablets 
B) 154 tablets 
C) 250 tablets 
D) 649 tablets 
E) 770 tablets 
A) 17 tablets 
B) 154 tablets 
C) 250 tablets 
D) 649 tablets 
E) 770 tablets

Question 7

Mass is the force resulting from the pull of gravity upon an object.

Accepted Answer

A) True 
 B)False

Question 8

What method used by scientists is the systematic approach to the discovery of new information?

Accepted Answer

A) analytical method 
B) hypothetical method 
C) chemical method 
D) technological method 
E) scientific method 
A) analytical method 
B) hypothetical method 
C) chemical method 
D) technological method 
E) scientific method

Question 9

Which statement concerning changes in matter is FALSE?

Accepted Answer

A) A physical change alters the appearance of a substance, but not its identity. 
B) A chemical change alters the identity of a substance. 
C) A chemical change always results in the production of a new substance. 
D) A chemical change is also called a chemical reaction. 
E) Melting and freezing are chemical changes that change both the appearance of the substance as well as the identity of the substance. 
A) A physical change alters the appearance of a substance, but not its identity. 
B) A chemical change alters the identity of a substance. 
C) A chemical change always results in the production of a new substance. 
D) A chemical change is also called a chemical reaction. 
E) Melting and freezing are chemical changes that change both the appearance of the substance as well as the identity of the substance.

Question 10

Which one of the following is an example of a pure substance?

Accepted Answer

A) ethyl alcohol 
B) sugar water 
C) salt and pepper 
D) milk 
E) sand 
A) ethyl alcohol 
B) sugar water 
C) salt and pepper 
D) milk 
E) sand

Question 11

What type of change is represented by the decay of a fallen tree?

Accepted Answer

A) physical 
B) chemical 
C) molecular 
D) analytical 
E) All of the choices are correct. 
A) physical 
B) chemical 
C) molecular 
D) analytical 
E) All of the choices are correct.

Question 12

Equal masses of glass and steel at the same temperature will have different heat energies.

Accepted Answer

A) True 
 B)False

Question 13

The terms mass and weight are identical.

Accepted Answer

A) True 
 B)False

Question 14

Consider the following set of numbers.If the true value is 12.6 cm2, which of the following best describes the set of numbers? 12.6 cm2, 12.5 cm2, 12.6 cm2

Accepted Answer

A) accurate but not precise 
B) not accurate but precise 
C) accurate and precise 
D) neither accurate nor precise 
E) More information is needed to determine if the measurements are accurate. 
A) accurate but not precise 
B) not accurate but precise 
C) accurate and precise 
D) neither accurate nor precise 
E) More information is needed to determine if the measurements are accurate.

Question 15

Which of the following measured volumes has the most uncertainty?

Accepted Answer

A) 10 mL 
B) 10.0 mL 
C) 10.00 mL 
D) 10.000 mL 
E) All values have the same degree of uncertainty. 
A) 10 mL 
B) 10.0 mL 
C) 10.00 mL 
D) 10.000 mL 
E) All values have the same degree of uncertainty.

Question 16

What kind of energy is stored as the result of position or composition?

Accepted Answer

A) kinetic energy 
B) activation energy 
C) potential energy 
D) theoretical energy 
E) static energy 
A) kinetic energy 
B) activation energy 
C) potential energy 
D) theoretical energy 
E) static energy

Question 17

Which statement concerning the classification of matter is FALSE?

Accepted Answer

A) All matter is either pure substance or a compound. 
B) An element is a pure substance that generally cannot be changed into a simpler form of matter. 
C) A compound is a pure substance made up of two or more different elements combined in a definite, reproducible way. 
D) A pure substance is composed of only one type of component. 
E) A mixture is the physical combination of two or more pure substances in which each substance retains its own identity. 
A) All matter is either pure substance or a compound. 
B) An element is a pure substance that generally cannot be changed into a simpler form of matter. 
C) A compound is a pure substance made up of two or more different elements combined in a definite, reproducible way. 
D) A pure substance is composed of only one type of component. 
E) A mixture is the physical combination of two or more pure substances in which each substance retains its own identity.

Question 18

How many significant figures does the number 5.06305 × 104 contain?

Accepted Answer

A) 4 
B) 5 
C) 6 
D) 7 
E) 9 
A) 4 
B) 5 
C) 6 
D) 7 
E) 9

Question 19

If a person smokes 10.0 packs of cigarettes a week and each cigarette contains 5.00 mg of tar, how many years will she have to smoke to inhale 0.250 pounds of tar? [20 cigarettes = 1 pack, 1 pound = 454 g and 1 year = 52 weeks]

Accepted Answer

A) 2.18 y 
B) 2.18 × 10-2 y 
C) 1.06 y 
D) 28.6 y 
E) 0.556 y 
A) 2.18 y 
B) 2.18 × 10-2 y 
C) 1.06 y 
D) 28.6 y 
E) 0.556 y

Question 20

Which measurement represents the largest volume?

Accepted Answer

A) 4.6 L 
B) 4.6 × 10−3 L 
C) 46 cL 
D) 460 mL 
E) All represent the same volume. 
A) 4.6 L 
B) 4.6 × 10−3 L 
C) 46 cL 
D) 460 mL 
E) All represent the same volume.

Exam 1: Chemistry:methods and Measurement

One calorie is the amount of energy needed to raise the temperature of one gram of water one degree Celsius.

Air has an average density of 0.001226 g/mL.What volume of air would have a mass of 1.0 lb? [454 g = 1 pound]

What Fahrenheit temperature corresponds to -40.0°C?

Conversion of ice to liquid water or liquid water to steam is an example of what kind of change?

What are the two classes of pure substances?

A typical aspirin tablet contains 5.00 grains of pure aspirin analgesic compound.The rest of the tablet is starch.How many aspirin tablets can be made from 50.0 g of pure aspirin? [Use: 1.00 g = 15.4 grains]

Mass is the force resulting from the pull of gravity upon an object.

What method used by scientists is the systematic approach to the discovery of new information?

Which statement concerning changes in matter is FALSE?

Which one of the following is an example of a pure substance?

What type of change is represented by the decay of a fallen tree?

Equal masses of glass and steel at the same temperature will have different heat energies.

The terms mass and weight are identical.

Consider the following set of numbers.If the true value is 12.6 cm2, which of the following best describes the set of numbers? 12.6 cm2, 12.5 cm2, 12.6 cm2

Which of the following measured volumes has the most uncertainty?

What kind of energy is stored as the result of position or composition?

Which statement concerning the classification of matter is FALSE?

How many significant figures does the number 5.06305 × 104 contain?

If a person smokes 10.0 packs of cigarettes a week and each cigarette contains 5.00 mg of tar, how many years will she have to smoke to inhale 0.250 pounds of tar? [20 cigarettes = 1 pack, 1 pound = 454 g and 1 year = 52 weeks]

Which measurement represents the largest volume?

The Structure of the Atom and the Periodic Table

Structure and Properties of Ionic and Covalent Compounds

Calculations, Chemical Changes, and the Chemical Equation

States of Matter- Gases, Liquids, and Solids

Solutions

Energy, Rate and Equilibrium

Acids and Bases

The Nucleus, Radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry- the Saturated Hydrocarbons

The Unsaturated Hydrocarbons- Alkenes, Alkynes, and Aromatics

Alcohols, Phenols, Thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

Filters

Consider the following set of numbers.If the true value is 12.6 cm², which of the following best describes the set of numbers? 12.6 cm², 12.5 cm², 12.6 cm²

How many significant figures does the number 5.06305 × 10⁴ contain?