Biology, 09.11.2021 22:50, bandzswagg123

A scientist finds a 200 gram rock composed of 150 grams of Lead-207 and 50 grams of Uranium-235. They know that the rock used to be entirely made of Uranium-235. The half-life of U-235 is 700 million years. How old is the rock?

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A scientist finds a 200 gram rock composed of 150 grams of Lead-207 and 50 grams of Uranium-235. The...