CHemistry
posted by Laura .
The halflife of tritium is approximately 12 years. What will be the molar ratio of tritium to helium3 in a sealed sampel after 25 years?

k = 0.693/t_{1/2}
Solve for k and substitute in the equation below.
ln(No/N) = kt
Solve for No/N
Then you want [N/(NoN)]. Check my thinking.
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