Question: Plutonium-239 is created from uranium in nuclear reactors and has a half life of 24,000 years. How many molecules would be left from a 1-mole

Plutonium-239 is created from uranium in nuclear reactors and has a half life of 24,000 years. How many molecules would be left from a 1-mole sample of 6.02 x 10^{23} molecules after two half lives?

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