Chemistry 12th Edition

Published by McGraw-Hill Education
ISBN 10: 0078021510
ISBN 13: 978-0-07802-151-0

Chapter 13 - Chemical Kinetics - Questions & Problems - Page 610: 13.25

Answer

The half-life is 30 mins

Work Step by Step

75% decomposition means that $\frac{1}{4}$ is left. Thus, this means two half lives would have taken place. Thus: $$=60 \ min / 2 = 30\ \text{minutes per half life}$$
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