Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 1 - Introduction: Matter and Measurement - Exercises: 1.35


Exact b,d,f Inexact a,c,e

Work Step by Step

Exact Numbers have values that are known exactly, and inexact values have uncertainty to them, normally due to measurement. Measurement A is inexact, because every index card will have minute differences that alter the mass. B is exact, because a pound will always have 16 ounces. C is inexact because the volume of the coffee isn't standardized, it has potential to change. D is exact because there will always be the same amount of inches in a mile. E is inexact because the number of microseconds is so large that it is subject to small differences. F is exact because the book always has the same number of pages.
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