Chemistry and Chemical Reactivity (9th Edition)

by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.

Published by Cengage Learning

ISBN 10: 1133949649

ISBN 13: 978-1-13394-964-0

Chapter 2 Atoms, Molecules, and Ions - Study Questions - Page 95a: 24

Answer

Their abundances are $48.02\%$ and $51.98\%$ respectively.

Work Step by Step

Europium's atomic weight is 151.96: $150.9197\times x+152.9212\times(1-x)=151.96$ solving for x: $x=0.4802$ Their abundances are $48.02\%$ and $51.98\%$ respectively.

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