Answer
$1/256$ remains in the patient's body.
Work Step by Step
2 days = 8 half lives if each half life is 6 hours. $(1/2)^8 = 1/256$
Chemistry 9th Edition
by Zumdahl, Steven S.; Zumdahl, Susan A.
Published by
Cengage Learning
ISBN 10:
1133611095
ISBN 13:
978-1-13361-109-7
Chapter 19 - The Nucleus: A Chemist's View - Exercises - Page 921: 33
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