A rock contains 270 µmol of 238U (t1/2 = 4.5 x 109 yr) and 110 µmol of 206Pb . a. If you assume that all of the 206Pb came from the decay of 238U , what was the initial amount, A0, of 238U? (i.e., assume the µmol of 206Pb used to be 238U ) b. Estimate the rock’s age.
A rock contains 270 µmol of 238U (t1/2 = 4.5 x 109 yr) and 110 µmol of 206Pb . a. If you assume that all of the 206Pb came from the decay of 238U , what was the initial amount, A0, of 238U? (i.e., assume the µmol of 206Pb used to be 238U ) b. Estimate the rock’s age.
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter21: Nuclear Chemistry
Section: Chapter Questions
Problem 39E: A sample of rock was found to contain 8.23 mg of rubidium-87 and 0.47 mg of strontium-87.. (a)...
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A rock contains 270 µmol of 238U (t1/2 = 4.5 x 109 yr) and 110 µmol of 206Pb .
a. If you assume that all of the 206Pb came from the decay of 238U , what was the initial amount, A0, of 238U? (i.e., assume the µmol of 206Pb used to be 238U )
b. Estimate the rock’s age.
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