Chemistry: Molecular Approach (4th Edition)

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

Chapter 1 - Exercises - Page 39: 79

Answer

B and D

Work Step by Step

a) pi is not exact, since it is not a whole number, and its exact value is unknown b) the number is whole, and its value is exactly known by definition, so it has an unlimited number of significant figures c) although the number is whole, it represents the result of a measurement, so it has 2 significant figures, not unlimited d) same as b)
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