Chemistry: The Molecular Science (5th Edition)

Published by Cengage Learning
ISBN 10: 1285199049
ISBN 13: 978-1-28519-904-7

Chapter 18 - Nuclear Chemistry - Questions for Review and Thought - General Questions - Page 817d: 72


0.03125 mg

Work Step by Step

Number of half-lives underwent= $\frac{335\,h}{67.0\,h}=5$ There are exactly five half-lives. This means that the initial quantity is reduced by half five times. Amount of sample left= $1.000\,mg\times\frac{1}{2}\times\frac{1}{2}\times\frac{1}{2}\times\frac{1}{2}\times\frac{1}{2}$ $=1.000\,mg\times\frac{1}{32}=0.03125\,mg$
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