half life of tritium is 12.5 years. how much will remain after 100 years if you started wit 256 grams?

Answer 1

First determine k.
k = 0.593/t^1/2, then substitute the value of k into the equation below.

ln(256/N) = k(100)
Solve for N in grams.

Answer 2

Thanks so much!

Answer 3

I made two typos. k = 0.693/t_1/2