P32 is a radioactive isotope with a half-life of 14.3 days. If you currently have 23.5 g of P32 , how much P32 was present 4.00 days ago?

Explanation:

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In this case, since the radioactive decay is modelled by using the following equation:

Thus, since A is referred to the initial and final amounts the radioactive isotope, we can compute the remaining mass of P32 once 4.00 days have passed by plugging in the given data:

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i think its 5049.

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