- #1

SUchica10

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**A sample of tritium 3 decayed to 94.5% of its original amount after a year.**

(a) What is the half-life of tritium-3?

(b) How long would it take the sample to decay to 20% of its original

amount?

(a) What is the half-life of tritium-3?

(b) How long would it take the sample to decay to 20% of its original

amount?

The only equations given in my book are dm/dt = km and m(t) = m(0)e^kt but the mass is not given in the problem. Is there another equation I should be using or am I just not seeing what exactly I should be using from the problem?