Answer
Average Atomic mass of Gallium = 69.72
Work Step by Step
Average Atomic mass of Gallium = 68.93 x 60.11/100 + 70.92 x 39.89/100
= 41.434 + 28.29
= 69.72
Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)
by Timberlake, Karen C.
Published by
Prentice Hall
ISBN 10:
0321908449
ISBN 13:
978-0-32190-844-5
Chapter 4 - Section 4.5 - Isotopes and Atomic Mass - Questions and Problems - Page 115: 4.37
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