74.During the past several years, you have gained chemical
vocabulary and understanding from a variety of academic
and entertainment venues. List three events that occurred
early in the development of your current chemical knowl-
edge.
75.At what temperature will a Fahrenheit thermometer give:
(a) the same reading as a Celsius thermometer? (b) a read-
ing that is twice that on the Celsius thermometer? (c) a
reading that is numerically the same but opposite in sign
from that on the Celsius thermometer?
*76.Cesium atoms are the largest naturally occurring atoms.
The radius of a cesium atom is 2.62 Å. How many cesium
atoms would have to be laid side by side to give a row of
cesium atoms 1.00 in. long? Assume that the atoms are
spherical.
*77.Based on what you have learned during the study of this
chapter, write a question that requires you to use chemi-
cal information but no mathematical calculations.
*78.As you write out the answer to an end-of-chapter exercise,
what chemical changes occur? Did your answer involve
knowledge not covered in Chapter 1?
*79.Combustionis discussed later in this textbook; however, you
probably already know what the term means. (Look it up
to be sure.) List two other chemical terms that were in your
vocabulary before you read Chapter 1.Exercises 45