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6. If we start with 1.000 g of strontium-90, 0.953 g will remain after 2.00 yr. (a) what is the half-life of strontium-90? (b) How

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6. If we start with 1.000 g of strontium-90, 0.953 g will remain after 2.00 yr. (a) what is the half-life of strontium-90? (b) How much strontium-90 will remain after 5.00 yr

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