the half-life of tritium is 12.26 y
what would be the rate of decay of tritium atoms per second in 1.00 L of hydrogen gas at STP containing 0.15% tritium atoms ?
A=Ao e^-.693 Time/Th
dA/dt=Ao (-.693/Th)e^(-.693Time/Th)
Ao=avagnumber*1/22.4*.0015
Time=0
solve for dA/dt the rate