illl7465 illl7465
  • 24-08-2022
  • Chemistry
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The half-life of sr-90 is 28 years. after 56 years of decay only 0.40 g of a sample remains. what was the mass of the original sample? a. 0.050 g b. 0.10 g c. 3.2 g d. 1.6 g

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