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A radioactive counter gave a reading of 356 min-1 for a 12.3 mg sample of cobalt(II) chloride partially enriched with cobalt-60 (t1/2 = 5.2 yr). What percentage of the cobalt atoms is cobalt-60?

A radioactive counter gave a reading of 356 min-1 for a 12.3 mg sample of cobalt(II) chloride partially enriched with cobalt-60 (t1/2 = 5.2 yr). What percentage of the cobalt atoms is cobalt-60?

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter20: Nuclear Chemistry
Section: Chapter Questions
Problem 20.2QP
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A radioactive counter gave a reading of 356 min-1 for a 12.3 mg sample of cobalt(II) chloride partially enriched with cobalt-60 (t1/2 = 5.2 yr). What percentage of the cobalt atoms is cobalt-60?
Transcribed Image Text:A radioactive counter gave a reading of 356 min-1 for a 12.3 mg sample of cobalt(II) chloride partially enriched with cobalt-60 (t1/2 = 5.2 yr). What percentage of the cobalt atoms is cobalt-60?
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