Question 1

Written in scientific notation, 0.000 004 03 is

Accepted Answer

A)  0.403 × 10-5. 
B)  4.03 × 10-6. 
C)  4.03 × 106. 
D)  4.03 × 10-7. 
E)  4.03. 
A)  0.403 × 10-5. 
B)  4.03 × 10-6. 
C)  4.03 × 106. 
D)  4.03 × 10-7. 
E)  4.03.

Question 2

In this list, which substance can be classified as a chemical?

Accepted Answer

A) salt 
B) heat 
C) temperature 
D) cold 
E) sleep 
A) salt 
B) heat 
C) temperature 
D) cold 
E) sleep

Question 3

Water, H2O, is an example of a(n)

Accepted Answer

A) chemical. 
B) electric charge. 
C) element. 
D) type of energy. 
E) wave. 
A) chemical. 
B) electric charge. 
C) element. 
D) type of energy. 
E) wave.

Question 4

40 students complete the first semester chemistry course. If 32 students take the second semester class, ____%
are taking this class.

Accepted Answer

The answer of 40 students complete the first semester chemistry...

Question 5

The first step in the scientific method is to ________.

Accepted Answer

The answer of The first step in the scientific method...

Question 6

Any material used in or produced by a chemical reaction is a(n)________.

Accepted Answer

The answer of Any material used in or produced by...

Question 7

There is more traffic between 8:00 and 9:00 AM because most people start work at 9:00 AM. This would be a(n)

Accepted Answer

A) observation. 
B) hypothesis. 
C) conclusion/theory. 
D) experiment. 
A) observation. 
B) hypothesis. 
C) conclusion/theory. 
D) experiment.

Question 8

Which of the following would NOT be part of a study plan to learn chemistry?

Accepted Answer

A) form a study group 
B) work the sample problems 
C) skip your professor's office hours 
D) read the chapter before class 
E) study a little every day 
A) form a study group 
B) work the sample problems 
C) skip your professor's office hours 
D) read the chapter before class 
E) study a little every day

Question 9

Sodium fluorophosphate is a chemical used in toothpaste to

Accepted Answer

A) keep the paste from spoiling. 
B) make the paste white. 
C) remove plaque. 
D) strengthen tooth enamel. 
E) disinfect the toothbrush. 
A) keep the paste from spoiling. 
B) make the paste white. 
C) remove plaque. 
D) strengthen tooth enamel. 
E) disinfect the toothbrush.

Question 10

Which of the following is a chemical?

Accepted Answer

A) light 
B) sound 
C) sugar 
D) noise 
E) heat 
A) light 
B) sound 
C) sugar 
D) noise 
E) heat

Question 11

When a part of the body is injured, substances called ________ are released.

Accepted Answer

A) nitrogen oxides 
B) chlorofluorocarbons 
C) prostaglandins 
D) aspirins 
E) pain relievers 
A) nitrogen oxides 
B) chlorofluorocarbons 
C) prostaglandins 
D) aspirins 
E) pain relievers

Question 12

You notice that there is more traffic between 8:00 and 9:00 AM. This would be a(n)

Accepted Answer

A) hypothesis. 
B) experiment. 
C) observation. 
D) conclusion/theory. 
A) hypothesis. 
B) experiment. 
C) observation. 
D) conclusion/theory.

Question 13

Which of the following is NOT a chemical?

Accepted Answer

A) light 
B) salt 
C) sugar 
D) water 
E) carbon dioxide 
A) light 
B) salt 
C) sugar 
D) water 
E) carbon dioxide

Question 14

In the number 45.678, the digit 6 is in the ________ place.

Accepted Answer

The answer of In the number 45.678, the digit 6...

Question 15

The second step in the scientific method is to ________.

Accepted Answer

The answer of The second step in the scientific method...

Question 16

On the graph, how long does it take to cool to from 80 °C go 45 °C?

Accepted Answer

A)  42 min 
B)  35 min 
C)  75 min 
D)  25 min 
E)  60 min 
A)  42 min 
B)  35 min 
C)  75 min 
D)  25 min 
E)  60 min

Question 17

Written in scientific notation, 8300 is

Accepted Answer

A)  8.3 × 10-2. 
B)  8.3 × 102. 
C)  8.3 × 103. 
D)  8.3 × 104. 
E)  8.3 × 10-3. 
A)  8.3 × 10-2. 
B)  8.3 × 102. 
C)  8.3 × 103. 
D)  8.3 × 104. 
E)  8.3 × 10-3.

Question 18

12 is what percentage of 36?

Accepted Answer

A) 3% 
B) 30% 
C) 12% 
D) 33% 
E) 330% 
A) 3% 
B) 30% 
C) 12% 
D) 33% 
E) 330%

Question 19

An abrasive used in toothpaste is ________.

Accepted Answer

The answer of An abrasive used in toothpaste is ________....

Question 20

For the equation 6y -20 = -2 , y equals

Accepted Answer

A) -3 
B) 2 
C) 4 
D) -2 
E) 3 
A) -3 
B) 2 
C) 4 
D) -2 
E) 3

Exam 1: Chemistry in Our Lives

Written in scientific notation, 0.000 004 03 is

In this list, which substance can be classified as a chemical?

Water, H2O, is an example of a(n)

40 students complete the first semester chemistry course. If 32 students take the second semester class, ____% are taking this class.

The first step in the scientific method is to ________.

Any material used in or produced by a chemical reaction is a(n)________.

There is more traffic between 8:00 and 9:00 AM because most people start work at 9:00 AM. This would be a(n)

Which of the following would NOT be part of a study plan to learn chemistry?

Sodium fluorophosphate is a chemical used in toothpaste to

Which of the following is a chemical?

When a part of the body is injured, substances called ________ are released.

You notice that there is more traffic between 8:00 and 9:00 AM. This would be a(n)

Which of the following is NOT a chemical?

In the number 45.678, the digit 6 is in the ________ place.

The second step in the scientific method is to ________.

On the graph, how long does it take to cool to from 80 °C go 45 °C?

Written in scientific notation, 8300 is

12 is what percentage of 36?

An abrasive used in toothpaste is ________.

For the equation 6y -20 = -2 , y equals

Chemistry and Measurements

Matter and Energy

Atoms and Elements

Nuclear Chemistry

Ionic and Molecular Compounds

Chemical Reactions and Quantities

Gases

Solutions

Reaction Rates and Chemical Equilibrium

Acids and Bases

Introduction to Organic Chemistry: Hydrocarbons

Alcohols, Phenols, Thiols, and Ethers

Aldehydes and Ketones

Carbohydrates

Carboxylic Acids and Esters

Lipids

Amines and Amides

Amino Acids and Proteins

Enzymes and Vitamins

Nucleic Acids and Protein Synthesis

Metabolic Pathways for Carbohydrates

Metabolism and Energy Production

Metabolic Pathways for Lipids and Amino Acids

Filters

Water, H₂O, is an example of a(n)