Chemistry: Molecular Approach (4th Edition)

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

Chapter 2 - Exercises - Page 80: 71

Answer

69.723 amu

Work Step by Step

Multiply the relative abundance of each isotope by its atomic mass, then add them together to get the atomic mass of the element. atomic mass = (0.60108)(68.92558 amu) + (0.39892)(70.92470 amu) = 69.723 amu
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