A sample of rock was found to contain 4.43 x 105 mol of 40K and 2.51 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 x 10 years for 40K) i 1.28 x 10 9 yrs

A sample of rock was found to contain 4.43 x 105 mol of 40K and 2.51 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 x 10 years for 40K) i 1.28 x 10 9 yrs

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

A sample of rock was found to contain 4.43 x 105 mol of 40K and 2.51 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 x 10⁰ years for 40K)
i
1.28
x 10
i9
yrs

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