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Posted by **Mima** on Tuesday, April 24, 2012 at 4:08pm.

- Chemistry -
**DrBob222**, Tuesday, April 24, 2012 at 4:20pmk = 0.693/t

_{1/2}

solve for k.

ln(No/N) = kt

No = 5.00 g

N = ?

k from above.

t = time in years = 15,000

- Chemistry -
**Mima**, Tuesday, April 24, 2012 at 4:40pmThank you so much.

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