Test Bank for General, Organic, and Biological Chemistry: Structures of Life, 5th Edition by Karen C. Timberlake 2025–2026 | Complete Verified Exam Questions and Answers

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,14) In the number 12.345, the 4 is in the ________ place.
A) tens
B) ones
C) tenths
D) hundredths
E) thousandths
Answer: D
Objective: 1.4
Global Outcomes: GO4

15) In the number 12.345, the 1 is in the ________ place.
A) tens
B) ones
C) tenths
D) hundredths
E) thousandths
Answer: A
Objective: 1.4
Global Outcomes: GO4

16) In the number 12.345, the 3 is in the ________ place.
A) tens
B) ones
C) tenths
D) hundredths
E) thousandths
Answer: C
Objective: 1.4
Global Outcomes: GO4

17) The product of (-4) × (-5) is
A) -20.
B) +20.
C) -1.
D) +1.
E) 0.
Answer: B
Objective: 1.4
Global Outcomes: GO4

18) For the equation 4x + 2 = 10 , x equals
A) 8.
B) 12.
C) 3.
D) 2.
E) -2.
Answer: D
Objective: 1.4
Global Outcomes: GO4

19) For the equation -10 - (-4) =
A) 6.
B) -6.
C) 14.
D) -14.
E) 4.
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,Answer: B
Objective: 1.4
Global Outcomes: GO4

20) 12 is what percent of 36?
A) 3%
B) 30%
C) 33%
D) 330%
E) 12%
Answer: C
Objective: 1.4
Global Outcomes: GO4

21) 16 is what percent of 80?
A) 200%
B) 20%
C) 2%
D) 5%
E) 50%
Answer: B
Objective: 1.4
Global Outcomes: GO4

22) Written in scientific notation, 540 000 is
A) 0.54 × 106.
B) 54 × 108.
C) 5.4 × 10-5.
D) 5.4 × 105.
E) 5.4.
Answer: D
Objective: 1.4
Global Outcomes: GO4




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,23) Written in scientific notation, 8300 is
A) 8.3 × 102.
B) 8.3 × 103.
C) 8.3 × 104.
D) 8.3 × 10-3.
E) 8.3 × 10-2.
Answer: B
Objective: 1.4
Global Outcomes: GO4

24) Written in scientific notation, 0.000 000 33 is
A) 3.3 × 107.
B) 3.3 × 10-7.
C) 3.3 × 10-8.
D) 3.3 × 108.
E) 3.3.
Answer: B
Objective: 1.4
Global Outcomes: GO4

25) Written in scientific notation, 0.000 004 03 is
A) 4.03 × 10-7.
B) 4.03 × 10-6.
C) 4.03 × 106.
D) 0.403 × 10-5.
E) 4.03.
Answer: B
Objective: 1.4
Global Outcomes: GO4

1.2 True/False Questions

1) Titanium dioxide in toothpaste is used as a detergent.
Answer: FALSE
Objective: 1.1
Global Outcomes: GO2

2) Calcium carbonate is used to sweeten toothpaste.
Answer: FALSE
Objective: 1.1
Global Outcomes: GO2

3) Paracelsus was a Greek philosopher.
Answer: FALSE
Objective: 1.1
Global Outcomes: GO2




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,4) The first step in the scientific method is to draw a conclusion.
Answer: FALSE
Objective: 1.2
Global Outcomes: GO1

5) Doing experiments to test your hypothesis is part of the scientific method.
Answer: TRUE
Objective: 1.2
Global Outcomes: GO1

6) Working with a group of students can help you learn chemistry.
Answer: TRUE
Objective: 1.3
Global Outcomes: GO2

7) Keeping a problem notebook will help you do well in your chemistry class.
Answer: TRUE
Objective: 1.3
Global Outcomes: GO2

8) It is a good idea to wait until the night before an exam to start to study.
Answer: FALSE
Objective: 1.3
Global Outcomes: GO2

9) In the number 123.45, the digit 5 is in the hundreds place.
Answer: FALSE
Objective: 1.4
Global Outcomes: GO4

10) When -7 is added to -5 the answer is 12.
Answer: FALSE
Objective: 1.4
Global Outcomes: GO4

11) If a negative number is divided by another negative number, the answer will be a positive number.
Answer: TRUE
Objective: 1.4
Global Outcomes: GO4

12) 3.5 × 103 is equal to 3500.
Answer: TRUE
Objective: 1.4
Global Outcomes: GO4

13) 2.25 × 10-4 is equal to 22500.
Answer: FALSE
Objective: 1.4
Global Outcomes: GO4




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,1.3 Short Answer Questions

1) A substance that consists of one type of matter and always has the same composition and properties is
called a ________.
Answer: chemical
Objective: 1.1
Global Outcomes: GO2

2) Any material used in or produced by a chemical reaction is a ________.
Answer: chemical
Objective: 1.1
Global Outcomes: GO2

3) An abrasive used in toothpaste is ________.
Answer: calcium carbonate
Objective: 1.1
Global Outcomes: GO2

4) The substances released when tissues are injured are ________.
Answer: prostaglandins
Objective: 1.1
Global Outcomes: GO2

5) Substances which prevent spoilage are called ________.
Answer: antioxidants
Objective: 1.1
Global Outcomes: GO2

6) The chemical used to make cans and foil is ________.
Answer: aluminum
Objective: 1.1
Global Outcomes: GO2

7) The first step in the scientific method is to ________.
Answer: make observations
Objective: 1.2
Global Outcomes: GO2

8) The second step in the scientific method is to ________.
Answer: make a hypothesis
Objective: 1.2
Global Outcomes: GO2

9) In the number 45.678, the digit 6 is in the ________ place.
Answer: tenths
Objective: 1.4
Global Outcomes: GO2




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,Express each of the following numbers using scientific notation.

10) 351 000 000 000
Answer: 3.51 × 1011
Objective: 1.4
Global Outcomes: GO4

11) 0.000 860
Answer: 8.60 × 10-4
Objective: 1.4
Global Outcomes: GO4

12) 5 207 000
Answer: 5.207 × 106
Objective: 1.4
Global Outcomes: GO4

13) 0.000 000 050
Answer: 5.0 × 10-8
Objective: 1.4
Global Outcomes: GO4




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, General, Organic & Biological Chemistry, 5e (Timberlake)
Chapter 2 Chemistry and Measurements

2.1 Multiple-Choice Questions

1) The metric base unit for length is the
A) meter.
B) inch.
C) millimeter.
D) kilometer.
E) foot.
Answer: A
Objective: 2.1
Global Outcomes: GO2

2) The metric unit for volume is the
A) meter.
B) quart.
C) liter.
D) pint.
E) centimeter.
Answer: C
Objective: 2.1
Global Outcomes: GO2

3) Which of the following is the basic unit of mass in the SI?
A) pound
B) kilogram
C) milligram
D) microgram
E) gram
Answer: B
Objective: 2.1
Global Outcomes: GO2

4) Which of the following is a measurement of mass in the metric system?
A) milliliter
B) centimeter
C) kilogram
D) Celsius
E) meter
Answer: C
Objective: 2.1
Global Outcomes: GO2




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