Introduction To Basic Chemistry, 7Th International Edition by Steven Zumdahl - Test Bank

,Chapter 01 - Chemistry: An Introduction

1. Define the following terms:
a. science
b. chemistry

ANS:
a. Science - a framework for gaining and organizing knowledge. It is a procedure for
processing and understanding certain information.
b. Chemistry - the science that deals with the matter of the universe and the changes it can
undergo.

PTS: 1 DIF: easy TOP: general concepts | definition of chemistry
MSC: general chemistry

2. Define the following terms:
a. scientific method
b. natural law
c. hypothesis
d. theory

ANS:
a. Scientific method - the process or steps of scientific inquiry.
b. Natural law - a statement describing observed behavior.
c. Hypothesis - a possible explanation for an observation.
d. Theory - a set of testsed hypotheses that gives an explanation for some behavior or
observation (also called a model).

PTS: 1 DIF: easy TOP: general concepts | scientific method
KEY: hypothesis | theory MSC: general chemistry

3. Which of the following is not a step in the scientific method?
a. Make an observation.
b. Formulate a hypothesis.
c. Perform an experiment.
d. Change results to agree with your hypothesis.
e. Develop a theory (or model).
ANS: D PTS: 1 DIF: easy
TOP: general concepts | scientific method MSC: general chemistry

4. A __________ is a summary of observed behavior, and a __________ is an explanation of
behavior.
a. law, measurement
b. theory, scientific method
c. theory, law
d. law, theory
e. hypothesis, theory
ANS: D PTS: 1 DIF: easy
TOP: general concepts | scientific method KEY: theory | law

,MSC: general chemistry

, Chapter 02 - Measurements and Calculations

1. Express 1840000 in scientific notation.
a. 5.41  10–8
b. 1.84  10–6
c. 1.84  106
d. 184  106
e. 184  104
ANS: C PTS: 1 DIF: easy
TOP: general concepts | measurement KEY: significant figures | scientific notation
MSC: general chemistry

2. Express 30523000 in scientific notation.
a. 3  107
b. 3.0523  107
c. 305  107
d. 30523  103
e. 305230  107

ANS: B PTS: 1 DIF: easy
TOP: general concepts | measurement KEY: significant figures | scientific notation
MSC: general chemistry

3. Write 8,394 in standard scientific notation.
a. 8394
b. 8.394  10–3
c. 839.4  101
d. 8.394  1000
e. 8.394  103

ANS: E PTS: 1 DIF: easy
TOP: general concepts | measurement KEY: significant figures | scientific notation
MSC: general chemistry

4. The number 0.00003009 expressed in exponential notation is
a. 3.009  10–5
b. 3.0  10–5
c. 3.009  105
d. 3.009  10–4
e. 3.009
ANS: A PTS: 1 DIF: easy
TOP: general concepts | measurement KEY: significant figures | scientific notation
MSC: general chemistry

5. The number 0.002 expressed in exponential notation is
a. 2  103
b. 2  104
c. 2  10–3
d. 2  10–4
e. none of these