Q4)----All but 4.25 percent of a sample of thorium-228 decays in 2877.4 years. What is the activity for a sample ofthorium-228 that contains 9.97x 108 atoms?Q5)-----Half of a sample of iodine-131 decays in 16.14 days. What is the activity for a sample of iodine-131 that contains 5.5 x 1020 atoms? Using the concept to solve non-routine problems. Justifyyour answer.

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Q4) All but 4.25 percent of a sample of thorium-228 decays in 2877.4 years. What is the activity for a sample of thorium-228 that contains 9.97x 108 atoms?

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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Question

Q4)
----
All but 4.25 percent of a sample of thorium-228 decays in 2877.4 years. What is the activity for a sample of
thorium-228 that contains 9.97x 108 atoms?
Q5)
-----
Half of a sample of iodine-131 decays in 16.14 days. What is the activity for a sample of iodine
-131 that contains 5.5 x 1020 atoms? Using the concept to solve non-routine problems. Justify
your answer.

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