Chemistry, 26.06.2019 10:10 millie54

Arock is found to contain 2.2 grams of uranium-235, a radioactive isotope. if the rock has undergone 2.75 half-lives, what was the original amount of uranium-235 in the rock and how old is the rock

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Arock is found to contain 2.2 grams of uranium-235, a radioactive isotope. if the rock has undergone...