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Consider 13.5 micro-grams of a radioactive isotope with a mass number of 85 and a half-life...

Consider 13.5 micro-grams of a radioactive isotope with a mass number of 85 and a half-life of 46.6 million years. If energy released in each decay is 46.6 keV, determine the total energy released in joules (J) in 1 (one) year. Give your answer with three significant figures.

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