oday, in the element Uranium, the mole fraction of the 238U isotope with a half-life of 4.51 * 10 9 years is 0.9928 and the mole fraction of the 235U isotope with a half-life of 7.0 * 108 years is 0.0072. Find how many years ago the mole fractions of two isotopes were equal to each other.
oday, in the element Uranium, the mole fraction of the 238U isotope with a half-life of 4.51 * 10 9 years is 0.9928 and the mole fraction of the 235U isotope with a half-life of 7.0 * 108 years is 0.0072. Find how many years ago the mole fractions of two isotopes were equal to each other.
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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Today, in the element Uranium, the mole fraction of the 238U isotope with a half-life of 4.51 * 10 9 years is 0.9928 and the mole fraction of the 235U isotope with a half-life of 7.0 * 108 years is 0.0072. Find how many years ago the mole fractions of two isotopes were equal to each other.
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