Question 1

Density and specific gravity can be expressed in the same units.

Accepted Answer

A) True 
 B)False  False

Question 2

In the scientific method,a law carries more weight than a hypothesis.

Accepted Answer

A) True 
 B)False  True

Question 3

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 B

Question 4

A patient weighs 146 pounds and is to receive a drug at a dosage of 45.0 mg per kg of body weight.What mass of the drug should the patient receive? [1 pound = 454 g]

Accepted Answer

A) 1.47 g 
B) 2.98 g 
C) 3.24 mg 
D) 1470 mg 
E) 6570 mg 
A) 1.47 g 
B) 2.98 g 
C) 3.24 mg 
D) 1470 mg 
E) 6570 mg

Question 5

Where is the uncertainty in the number 101.2°C?

Accepted Answer

A) in the ones place 
B) in the tens place 
C) in the tenths place 
D) in the hundredths place 
E) There is no uncertainty in this number. 
A) in the ones place 
B) in the tens place 
C) in the tenths place 
D) in the hundredths place 
E) There is no uncertainty in this number.

Question 6

What is the number 0.9050 written in scientific notation using the proper number of significant figures?

Accepted Answer

A) 0.9 × 104 
B) 9 × 10−1 
C) 9.05 × 10−1 
D) 9.050 × 104 
E) 9.050 × 10−1 
A) 0.9 × 104 
B) 9 × 10−1 
C) 9.05 × 10−1 
D) 9.050 × 104 
E) 9.050 × 10−1

Question 7

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 8

What is the specific gravity of an object that weighs 13.35 g and has a volume of 25.00 mL? The density of water under the same conditions is 0.980 g/mL.

Accepted Answer

A) 1.335 
B) 0.545 g/mL 
C) 0.534 g/mL 
D) 0.545 
E) 0.980 
A) 1.335 
B) 0.545 g/mL 
C) 0.534 g/mL 
D) 0.545 
E) 0.980

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

1 milligram is equivalent to how many grams?

Accepted Answer

A) 1000 
B) 100 
C) 0.1 
D) 0.01 
E) 0.001 
A) 1000 
B) 100 
C) 0.1 
D) 0.01 
E) 0.001

Question 11

Which statement concerning energy is FALSE?

Accepted Answer

A) Energy is the amount of heat content in an object. 
B) Potential energy is stored energy due to composition or position. 
C) Kinetic energy is the energy associated with movement. 
D) Heat,light,and electricity are different forms of energy. 
E) Conversion of energy from one form to another is possible. 
A) Energy is the amount of heat content in an object. 
B) Potential energy is stored energy due to composition or position. 
C) Kinetic energy is the energy associated with movement. 
D) Heat,light,and electricity are different forms of energy. 
E) Conversion of energy from one form to another is possible.

Question 12

Which temperature scale does not use a degree sign?

Accepted Answer

A) Celsius 
B) Kelvin 
C) Centigrade 
D) Fahrenheit 
E) Absolute zero 
A) Celsius 
B) Kelvin 
C) Centigrade 
D) Fahrenheit 
E) Absolute zero

Question 13

Which of the following is FALSE concerning the gas state?

Accepted Answer

A) Gases have no definite shape. 
B) Gases have no definite volume. 
C) Particles are far apart from each other. 
D) Particles are usually in a regular or organized pattern. 
E) When gas molecules collide,they do not lose energy. 
A) Gases have no definite shape. 
B) Gases have no definite volume. 
C) Particles are far apart from each other. 
D) Particles are usually in a regular or organized pattern. 
E) When gas molecules collide,they do not lose energy.

Question 14

A chemical reaction releases 44.3 kJ of heat.What is the equivalent amount of heat expressed in calories? [1 cal = 4.18 J]

Accepted Answer

A) 10.6 cal 
B) 106 cal 
C) 185 cal 
D) 10,600 cal 
E) 18,500 cal 
A) 10.6 cal 
B) 106 cal 
C) 185 cal 
D) 10,600 cal 
E) 18,500 cal

Question 15

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 16

How many cm are in 3.5 × 10-2 km?

Accepted Answer

A) 3.5 × 10-1 cm 
B) 3.5 × 10-7 cm 
C) 3.5 × 102 cm 
D) 3.5 × 105 cm 
E) 3.5 × 103 cm 
A) 3.5 × 10-1 cm 
B) 3.5 × 10-7 cm 
C) 3.5 × 102 cm 
D) 3.5 × 105 cm 
E) 3.5 × 103 cm

Question 17

A flask contains 145.675 mL of a saline solution.If 24.2 mL of the saline solution are withdrawn from the flask,how should the volume of the saline solution that remains in the flask be reported?

Accepted Answer

A) 121.475 mL 
B) 121.4 mL 
C) 121.5 mL 
D) 122 mL 
E) 121 mL 
A) 121.475 mL 
B) 121.4 mL 
C) 121.5 mL 
D) 122 mL 
E) 121 mL

Question 18

What is the density of a solid object that has the following measurements? mass = 189.6 g,length = 9.80 cm,width = 46.6 mm,height = 0.111 m.

Accepted Answer

A) 0.267 g/mL 
B) 0.374 g/mL 
C) 2.67 g/mL 
D) 3.74 g/mL 
E) 50.7 g/mL 
A) 0.267 g/mL 
B) 0.374 g/mL 
C) 2.67 g/mL 
D) 3.74 g/mL 
E) 50.7 g/mL

Question 19

A bolder at the top of a hill breaks free and rolls down the hill.Which statement best represents the change in energy that occurs in this process?

Accepted Answer

A) The potential energy of the bolder increases. 
B) The potential energy of the bolder is converted to kinetic energy. 
C) The kinetic energy of the bolder is converted to potential energy. 
D) The chemical energy of the bolder is converted to kinetic energy. 
E) No change in energy occurs; energy cannot be converted from one form to another. 
A) The potential energy of the bolder increases. 
B) The potential energy of the bolder is converted to kinetic energy. 
C) The kinetic energy of the bolder is converted to potential energy. 
D) The chemical energy of the bolder is converted to kinetic energy. 
E) No change in energy occurs; energy cannot be converted from one form to another.

Question 20

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.

Exam 1: Chemistry - Methods and Measurement

Density and specific gravity can be expressed in the same units.

In the scientific method,a law carries more weight than a hypothesis.

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]

A patient weighs 146 pounds and is to receive a drug at a dosage of 45.0 mg per kg of body weight.What mass of the drug should the patient receive? [1 pound = 454 g]

Where is the uncertainty in the number 101.2°C?

What is the number 0.9050 written in scientific notation using the proper number of significant figures?

What are the two classes of pure substances?

What is the specific gravity of an object that weighs 13.35 g and has a volume of 25.00 mL? The density of water under the same conditions is 0.980 g/mL.

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

1 milligram is equivalent to how many grams?

Which statement concerning energy is FALSE?

Which temperature scale does not use a degree sign?

Which of the following is FALSE concerning the gas state?

A chemical reaction releases 44.3 kJ of heat.What is the equivalent amount of heat expressed in calories? [1 cal = 4.18 J]

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

How many cm are in 3.5 × 10-2 km?

A flask contains 145.675 mL of a saline solution.If 24.2 mL of the saline solution are withdrawn from the flask,how should the volume of the saline solution that remains in the flask be reported?

What is the density of a solid object that has the following measurements? mass = 189.6 g,length = 9.80 cm,width = 46.6 mm,height = 0.111 m.

A bolder at the top of a hill breaks free and rolls down the hill.Which statement best represents the change in energy that occurs in this process?

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

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 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

How many cm are in 3.5 × 10^-2 km?