how long (in minutes) would it take for the amount of 41Ar to decrease to 54.04% of its initial amount?

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter11: Chemical Kinetics: Rates Of Reactions
Section: Chapter Questions
Problem 37QRT: Radioactive gold-198 is used in the diagnosis of liver problems. 198Au decays in a first-order...
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Radioactive decay is a process that follows first-order kinetics. The half-life of 41Ar is 0.01256 years; how long (in minutes) would it take for the amount of 41Ar to decrease to 54.04% of its initial amount?

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