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Radioactive rhodium-99 decays with a half-life of 16.1 days. (a) What is the value of k in s-¹? -1 (b) A sample contains 22.0 mg 99Rh. How many decay events will be produced in the first second? Assume that the atomic mass of 99 Rh is 99.0. decay events (c) A chemist obtains a fresh sample of 99 Rh and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 25.0% of the initial measured value. How long does she have to perform the experiment? days

Radioactive rhodium-99 decays with a half-life of 16.1 days. (a) What is the value of k in s-¹? -1 (b) A sample contains 22.0 mg 99Rh. How many decay events will be produced in the first second? Assume that the atomic mass of 99 Rh is 99.0. decay events (c) A chemist obtains a fresh sample of 99 Rh and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 25.0% of the initial measured value. How long does she have to perform the experiment? days

Chemistry
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
Chapter19: The Nucleus: A Chemist's View
Section: Chapter Questions
Problem 36E
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Radioactive rhodium-99 decays with a half-life of 16.1 days. (a) What is the value of k in s-¹? S`1 (b) A sample contains 22.0 mg ⁹⁹Rh. How many decay events will be produced in the first second? Assume that the atomic mass of 99Rh is 99.0. decay events (c) A chemist obtains a fresh sample of 99Rh and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 25.0% of the initial measured value. How long does she have to perform the experiment? days
Transcribed Image Text:Radioactive rhodium-99 decays with a half-life of 16.1 days. (a) What is the value of k in s-¹? S`1 (b) A sample contains 22.0 mg ⁹⁹Rh. How many decay events will be produced in the first second? Assume that the atomic mass of 99Rh is 99.0. decay events (c) A chemist obtains a fresh sample of 99Rh and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 25.0% of the initial measured value. How long does she have to perform the experiment? days
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