Chemistry, 20.03.2020 09:44, leonardkaren41ovlx1q

Geologists use the decay of potassium-40 in volcanic rocks to determine their age. Potassium-40 has a half-life of 1.26 109 years, so it can be used to date very old rocks. If a sample of rock 3.15 108 years old contains 2.73 10-7 g of potassium-40 today, how much potassium-40 was originally present in the rock

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Geologists use the decay of potassium-40 in volcanic rocks to determine their age. Potassium-40 has...

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