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?

Respuesta :

Answer:

[tex]A=19.4g[/tex]

Explanation:

Hello!

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

[tex]A=A_0*2^{\frac{-t}{t_{1/2}} }[/tex]

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:

[tex]A=23.5g*2^{\frac{-4.00days}{14.3days} }\\\\A=19.4g[/tex]

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