Test Bank For General Chemistry 11th Edition by Darrell Ebbing

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 OBJECTIVES:	GENE.EBBI.13.1 – Understand how the scientific method is an approach to 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
DIFFICULTY:	easy
REFERENCES:	1.2
HAS VARIABLES:	False
LEARNING OBJECTIVES:	GENE.EBBI.13.1 – Understand how the scientific method is an approach to 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

ANSWER:	c
POINTS:	1
DIFFICULTY:	easy
REFERENCES:	1.2
HAS VARIABLES:	False
LEARNING OBJECTIVES:	GENE.EBBI.13.1 – Understand how the scientific method is an approach to 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

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Test Bank For General Chemistry 11th Edition by Darrell Ebbing

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