Answer to Question #143638 in General Chemistry for sara santiago

Question

The half-life of chromium-51 is 28 days. If the sample contained 510
grams, how much chromium would remain after 56 days? How much
would remain after 1 year?

Answer 1

Using A_{t =} 2^{-time/half life} × initial concentration

When t= 56 days

A_t = 2^-56/28 × 510 grams

A_t = 127.5grams

When t= 1year = 365days

A_t =2^-365/28 × 510

A_t = 0.06 grams