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A sample of rock was found to contain 2.88 x 10-5 mol of 40K and 2.32 x 10-5 mol of 40 Ar. If we assume that all of the 40 Ar came from the decay of 40K, what is the age of the rock in years? (t1/2 = 1.3 × 10⁹ years for 40K) i x 10 i yrs

A sample of rock was found to contain 2.88 x 10-5 mol of 40K and 2.32 x 10-5 mol of 40 Ar. If we assume that all of the 40 Ar came from the decay of 40K, what is the age of the rock in years? (t1/2 = 1.3 × 10⁹ years for 40K) i x 10 i yrs

Chemistry: Principles and Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter21: Nuclear Chemistry
Section: Chapter Questions
Problem 21.41QE
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A sample of rock was found to contain 2.88 x 105 mol of 40K and 2.32 x 105 mol of 40 Ar. If we assume that all of the 40 Ar came from the decay of 40K, what is the age of the rock in years? (t1/2 = 1.3 × 10 years for 40K) i x 10 i yrs
Transcribed Image Text:A sample of rock was found to contain 2.88 x 105 mol of 40K and 2.32 x 105 mol of 40 Ar. If we assume that all of the 40 Ar came from the decay of 40K, what is the age of the rock in years? (t1/2 = 1.3 × 10 years for 40K) i x 10 i yrs
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