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10 May, 01:23

If 14 g of a radioactive substance are present initially and 3 years later only 7 g remain, how much of the substance will be present after 8 yr?

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Answers (2)
  1. 10 May, 01:31
    0
    Find the half-life of the substance, then solve.
  2. 10 May, 01:43
    0
    3.5 substances will be present after 8 years
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