A certain radioactive element has a half life of 8694 years. How much of a 8.30 g sample is left after 8323 years

The amount of sample left after 8323 years is 4.32g

Explanation:

Expression for rate law for first order kinetics is given by:

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process  

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

b) amount left after 8323 years

The amount of sample left after 8323 years is 4.32g