Naturally occurring uranium is composed mostly of 238U and 235U, with relative abundances of 99.28% and 0.72%, respectively. The half-life for 238U is 4.5 * 109 years, and the halflifefor 235U is 7.1 * 108 years. Assuming that the earth was formed 4.5 billion years ago, calculate the relative abundances of the 238U and 235U isotopes when the earth was formed

Decay constant for 238U can be calculated as: λ=0.693t12=0.6934.5×109years-1 Decay constant for 235…

Answered: Naturally occurring uranium is composed…

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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Naturally occurring uranium is composed mostly of ²³⁸U and ²³⁵U, with relative abundances of 99.28% and 0.72%, respectively. The half-life for ²³⁸U is 4.5 * 10⁹ years, and the halflife

for ²³⁵U is 7.1 * 10⁸ years. Assuming that the earth was formed 4.5 billion years ago, calculate the relative abundances of the ²³⁸U and ²³⁵U isotopes when the earth was formed

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