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Radioactive cobalt (60Co) is used for food sterilization and has a half-life of 7.3 years. If there are initially 801 g of the material, how

Radioactive cobalt (60Co) is used for food sterilization and has a half-life of 7.3 years. If there are initially 801 g of the material, how many grams will there be after 27.3 years?

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