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: 1.7a

Answer

You need no formulas for this problem

Work Step by Step

This problem involves reading a ruler, and it also introduces the idea of sig figs. It first wants us to determine the length of a pencil using a ruler on the page. The pencil is 7.5 cm long. Next it wants us to determine how many sig figs are in this measurement. In a proper measurement, all sig figs will be properly reported. Since this was an easy measurement to take, we can be fairly confident that the measurement has two sig figs. 7 is one, and .5 is the other.
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