How many mg of uranium were in the original rock specimen
Suppose that a rock contains 0.539 mg of 206Pb. If the current rock specimen contains 2.035 mg of 238U, how many mg of 238U were in the original rock specimen?
Choose one answer.
a. 0.539 mgb. 0.623 mgc. 2.658 mgd. 2.035 mg
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