Answer:
Explanation:Answer - 0.73%
14.6 .2
=
100 x
(Above is proportions I used to get the answer)
x = 0.73% which is the answer.
<span>Mg = 24.305 g/mol
O = 15.9994 g/mol</span>
Half-life refers to the time taken for half of the atoms in a radioactive substance to decay. Therefore in 1 half-life the 80 mg of substance will reduce to 40 mg. In another half-life it will reduce from 40 mg to 20 mg, then in a third half-life from 20 mg to 10 mg. Therefore the half-life is equal to the total time taken to decay from 80 mg to 10 mg divided by 3:
t(1/2) = 36 hours / 3 = 12 hours.
