Question

the half-life of a radioactive kind of iodine is 12 hours. how much will be left after 36 hours if you start with 832 grams of it

Answer 1

104 g

Explanation:

Using half life formula

A= a(1/2)^t/h, where t represents the hours, h represents the half life of iodine, a is the original amount and A is how much is left

A=
`832(1/2)^(36/12)`

=832(1/2)^3

=104 g left