The half life of a radioactive material is 120 months. How much of this material will be left after 350 months if the initial concentration is 2.40M?

Answer 1

k = -.693/t_{1/2</sub
Solve for k, then
ln(No/N) = kt.
No = 2.40
N = solve for this
You know k from above.
t = 120 months.}