Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Question

A rock containing 238U and 206Pb was examined to determine its approximate age. The molar ratio of 206Pb to 238U was 0.1682. Assuming no lead was originally present and that all lead formed from 238U remained in the rock, what is the age of the rock (in years)? The half-life of 238U is 4.500e+9 yr.

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