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October 20, 2014

October 20, 2014

Posted by **Mel** on Sunday, September 29, 2013 at 4:02pm.

- Chemitry -
**DrBob222**, Sunday, September 29, 2013 at 4:24pmI assume you mean how long will it take to decay from 0.10 mg to 1.25E-2 mg?

k = 0.693/t_{1/2}

ln(No/N) = kt

No = 0.10 mg

N = 1.25E-2 mg

k from above.

Substitute and solve for t. You will need to look up the half life of Am241.

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