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Tritium, 31H, is a radioactive nucleus of hydrogen. It decays by beta emission with a 1/2...

Tritium, 31H, is a radioactive nucleus of hydrogen. It decays by beta emission with a 1/2 life of 12.3 years. What is the decay constant in (in/s)? What is the activity (in Ci) of a sample containing 2.5 micrograms of tritium? The atomic mass of  31H is 3.02 amu.

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