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Strontium-90 has ahalf life of 28.79 years If the passing of 5 half lives leaves you with 25g of Sr-90 how much was present in the beginning?

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  • Strontium-90 has ahalf life of 28.79 years If the passing of 5 half lives leaves you with 25g of Sr-90 how much was present in the beginning?


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