Chemistry, 23.09.2021 03:50 smariedegray
A rock has 43.75 grams of Rb-87 and 306.25 grams of Sr-87, how many half-lives has it gone through?
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A rock has 43.75 grams of Rb-87 and 306.25 grams of Sr-87, how many half-lives has it gone through?...
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