Chemistry: Molecular Approach (4th Edition)

Published by Pearson
ISBN 10: 0134112830
ISBN 13: 978-0-13411-283-1

Chapter 1 - Section 1.7 - The Reliability of a Measurement - For Practice - Page 23: 1.5


a) 3 b) Unlimited c) 3 d) 2 e) 5 f) Ambiguous

Work Step by Step

a) all numbers that aren't 0's are significant b) this is a defined quantity due to the pennies, thus, making it unlimited c) the 1 and 1 are significant, and the 1 zero is an interior zero that is a sig fig d) 9 and 9 are sig figs, the zeroes aren't included because they are leading e) 1, 4, 5 are significant and the zeroes are trailing zeroes marked with a decimal making them sig figs f) you would assume 2 sig figs because of the 2 and 1 but it is ambiguous because the trailing zeroes imply the use of a decimal point, thus, making it ambiguous
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