SAT, 28.01.2022 14:00, ezrasedore

A moon rock collected by the apollo mission is estimated to be 3. 80 billion years old by uranium/lead dating. Assuming that the rock did not contain any lead when it was formed, what is the current mass of 206pb in the rock, given that it currently contains 1. 180 g of 238u? the half-life of 238u is 4. 47×109 years.

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