Exam Bank for General Chemistry 11th Edition by Darrell Ebbing

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TEST BANK – GENERAL CHEMISTRY,
12TH EDITION ( EBBING, GAMMON,
KOENIGSMANN & WU, 2025) CHAPTER
1- 24 COMPLETE QUESTIONS AND
ANSWERS




Chapter 01 - Chemistry and Measurement
1. What is a scientific theory?
a. It is a collection of experimental data.
b. It is an assertion of scientific fact.
c. It is a guess or conjecture about natural phenomena.
d. It is a fundamental relationship of nature.
e. It is an explanation of natural phenomena that has undergone significant testing.
ANSWER: e POINTS: 1
DIFFICULTY: easy
REFERENCES: 1.2

HAS VARIABLES: False
LEARNING OBJECTIVE GENE.EBBI.13.1 - Understand how the scientific method is an approach to
S: performing science.
TOPICS: general concepts
scientific method
OTHER: general chemistry

2. An untested explanation of a series of experimental observations is called _____.
a. a hypothesis
b. a theory
c. a law
d. an experiment
e. the scientific method
ANSWER: a
POINTS: 1

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DIFFICULTY: easy
REFERENCES: 1.2
HAS VARIABLES: False
LEARNING OBJECTIVE GENE.EBBI.13.1 - Understand how the scientific method is an approach to
S: performing science.
TOPICS: general concepts
scientific method

3. Which of the following statements concerning experiment and explanation is/are true?
1. A law is always given in the form of a mathematical expression.
2. Once a hypothesis passes one or two tests it is considered a theory.
3. Observation is a key component of the scientific method.
a. 1 only
b. 2 only
c. 3 only
d. 1 and 2
e. 1, 2, and 3
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Chapter 01 - Chemistry and Measurement
ANSWER: c
POINTS: 1
DIFFICULTY: easy
REFERENCES: 1.2
HAS VARIABLES: False
LEARNING OBJECTIVE GENE.EBBI.13.1 - Understand how the scientific method is an approach to
S: performing science.
TOPICS: general concepts
scientific method

4. A saline solution similar to that used for intravenous drips is made by dissolving 0.45 g sodium
chloride in 50.00 g water. Which of the following statements concerning the saline solution and the
law of conservation of mass is/are correct?
1. The mass of the saline solution is greater than the mass of water.
2. The mass of the saline solution is equal to the combined mass of sodium chloride and water.
3. The mass of the saline solution is greater than the mass of the sodium chloride.
a. 1 only
b. 2 only
c. 3 only
d. 1 and 2
e. 1, 2, and 3
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 1.3
HAS VARIABLES: False
LEARNING OBJECTIVES: GENE.EBBI.13.2 - Apply the law of the conservation of mass.
TOPICS: general concepts
matter

5. A 54.0-g sample of sodium is completely burned in air to form sodium oxide. The mass of
sodium oxide must be
a. less than 54.0 g.
b. greater than 54.0 g.
c. equal to 54.0 g.
d. all of the above.
e. none of the above.
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 1.3
HAS VARIABLES: True

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Chapter 01 - Chemistry and Measurement
LEARNING OBJECTIVES: GENE.EBBI.13.3 - Apply the law of the conservation of mass. (Example 1.1)
TOPICS: general concepts
matter

6. A sample of magnesium is burned in oxygen to form magnesium oxide. What mass of oxygen is consumed if
74.62 g magnesium oxide is formed from 45.00 g magnesium?
a. 29.62 g
b. 119.62 g
c. 3358.06 g
d. 0.60 g
e. none of the above.
ANSWER: a
POINTS: 1
DIFFICULTY: easy
REFERENCES: 1.3
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.2 - Apply the law of the conservation of mass.
TOPICS: general concepts
matter

7. In a certain chemical reaction, 9.11 g of compound A is added to 8.82 g of compound B. Once the reaction
is complete, 1.38 g of compound A and 1.61 g of compound B remain. What mass of products was produced?
a. 20.92 g
b. 7.21 g
c. 14.94 g
d. 7.73 g
e. 2.99 g
ANSWER: c
POINTS: 1
DIFFICULTY: easy
REFERENCES: 1.3
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.3 - Apply the law of the conservation of mass. (Example 1.1)
TOPICS: general concepts
matter
KEYWORDS: Law of Conservation of Mass
OTHER: general chemistry

8. A 7.45 g sample of calcium carbonate completely decomposes into calcium oxide (lime) and carbon dioxide gas
when heated. If 4.17 g calcium oxide is produced, what mass of carbon dioxide must have been formed?
a. 3.28 g
b. 11.62 g
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