Almost all of naturally occurring uranium is 238/92U with a half-life of 4.468 x 109 yr. Most
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(a) What was this percentage 1.0billion years ago?
(b) What percentage of the sample would be 235/92U in 100 million years?
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235 Since amounts are not specified we may suppose that there are 072 g of U and 0693 10000072992...View the full answer
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