Answer
Average Atomic mass of Rubidium = 85.47
Work Step by Step
Average Atomic mass of Rubidium = 84.91 x 72.17/100 + 86.91 x 27.83/100
= 61.28 + 24.19
= 85.47
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: 4.38
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