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July 24, 2014

July 24, 2014

Posted by **Jay** on Friday, May 6, 2011 at 11:20am.

- Chemistry -
**DrBob222**, Friday, May 6, 2011 at 6:24pmk = 0.693/t

_{1/2}

Substitute k into the equation below.

ln(No/N) = kt

No = 1.6878

N = 0.8671

k fro above.

Solve for t (in seconds) and change to years.

- Chemistry -
**Jude**, Friday, May 6, 2011 at 8:21pmThank you so much DrBob222

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