Chemistry: Molecular Approach (4th Edition)

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

Chapter 1 - Exercises: 77

Answer

a. 3; b. 3 or 6 depending if the trailing zeroes are significant or not; c. 3; d. 5; e. 1 or 4 depending if the trailing zeroes are significant or not

Work Step by Step

a. There are 3 significant figures 3, 1, and 2. The zeroes preceding before are nonsignificant. b. There are 3 significant figures 3, 1, and 2. The trailing zero after may or may not be significant. If the trailing zeroes are not significant, then there are 3 significant figures. If the trailing zeroes are significant, then there are 6 significant figures. c. There are 3 significant figures 3, 1, and 2. d. There are 5 significant figures 1, 3, 1, 2, and 7. e. There is 1 significant figures, 2. The trailing zero after may or may not be significant. If the trailing zeroes are not significant, then there are 1 significant figures. If the trailing zeroes are significant, then there are 4 significant figures.
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