Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0132525763
ISBN 13: 978-0-13252-576-3

Chapter 4 - Atomic Structure - 4.3 Distinguishing Among Atoms - Sample Problem 4.5 - Page 119: 24

Answer

63.5 amu

Work Step by Step

Multiply the percent of the relative abundance of each isotope by its atomic mass, and add them get the atomic mass. Atomic mass of isotope 1 = 62.93 amu (69.2%) Atomic mass of isotope 2 = 64.93 amu (30.8%) 62.93 (0.692) + 64.93 (0.308) = 63.5 amu
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