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radioactive sample contains 9.5 x 1017 atoms of a nuclide that decays at a rate of 5.4 x 1013 disintegrations per 20 min. What percentage of the nuclide will have decayed

radioactive sample contains 9.5 x 1017 atoms of a nuclide that decays at a rate of 5.4 x 1013 disintegrations per 20 min. What percentage of the nuclide will have decayed

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter19: Nuclear Chemistry
Section: Chapter Questions
Problem 51AP
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A radioactive sample contains 9.5 x 1017 atoms of a nuclide that decays at a rate of 5.4 x 1013 disintegrations per 20 min.

  1. What percentage of the nuclide will have decayed after 200 days?
  2. How many atoms of nuclide will remain in the sample?
  3. What is the half-life of the nuclide?
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