A rock is found to contain 22 grams of uranium-235 a
Question:
A rock 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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questiona rock is found to contain 22 grams of uranium-235 a radioactive isotope if the rock has undergone 275 half
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