A feldspar crystal in granite was analyzed for Potassium-40 and Argon-40. Measurements showed that approximately 75% of the Potassium-40 remained (had not been converted to daughter). Using the decay curve above, estimate the age of the rock.

A feldspar crystal in granite was analyzed for Potassium-40 and Argon-40. Measurements showed that approximately 75% of the Potassium-40 remained (had not been converted to daughter). Using the decay curve above, estimate the age of the rock.

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter4: Stoichiometry

Section: Chapter Questions

Problem 4.61PAE: 4.61 What is actually measured by the octane ratings of different grades of gasoline?

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Question

100
75
50
25
1.5
3.0
4.5
6.0
7.5
Time (Billion Years)
Percent Parent Remaining

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