Potassium-42 is used to locate brain tumors. Its half-life is 12.5 hours. Starting with 15.4 mg, what fraction will remain after 100 hours? If it was necessary to have at least 1 microgram for a particular procedure, could you hold the original sample for 200 hours before using it?

Potassium-42 is used to locate brain tumors. Its half-life is 12.5 hours. Starting with 15.4 mg, what fraction will remain after 100 hours? If it was necessary to have at least 1 microgram for a particular procedure, could you hold the original sample for 200 hours before using it?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Potassium-42 is used to locate brain tumors. Its half-life is 12.5 hours. Starting with
15.4 mg, what fraction will remain after 100 hours? If it was necessary to have at least 1
microgram for a particular procedure, could you hold the original sample for 200 hours before
using it?

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