sophia4241 sophia4241

04-03-2021
Chemistry

contestada

please help! brainliest to correct answer!!
If 80mg of a radioactive element decays to 10mg in 30 days, what is the elements
half life in minutes?

Respuesta :

tysonbryantzamya tysonbryantzamya

04-03-2021

Answer: 10 minutes

Explanation:

ln(No/N) = kt

No = 80 mg

N = 10 mg

t = 30 min

solve for k, then

k = 0.693/t1/2

Substitute k from above and solve for t1/2

10 min is correct.

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