Chemistry (12th Edition)

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

Chapter 4 - Atomic Structure - 4 Assessment: 64

Answer

207.24 amu

Work Step by Step

To calculate the average atomic mass we add the products of the relative abundance and the mass of each isotope together. Isotope 1: mass= 204 amu (1.4%) Isotope 2: mass= 206 amu (24.1%) Isotope 3: mass= 207 amu (22.1%) Isotope 4: mass= 208 amu (52.4%) = 204 (1.4%) + 206 (24.1%) + 207 (22.1%) + 208 (52.4%) = 204 (0.014) + 206 (0.241) + 207 (0.221) + 208 (0.524) = 207.24 amu
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