Chemistry: Molecular Approach (4th Edition)

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

Chapter 2 - Exercises: 128

Answer

0.09996 g

Work Step by Step

Mass of Co-59 = 58.9332 Mass of Co-60 = 59.9338 Average mass = 58.9332/59.9338 =58.9901 Fraction of the heavier isotope Co-60 = (58.9901 – 58.9332) / (59.9338 – 58.9332) = 0.0569/1.0006 = 0.05687 Then, Fraction of the lighter isotope Co-59 = 1- 0.05687 = 0.9431 The mass of Co-60 in 1.7567 g of sample mixture = 1.7567 X 0.0569
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