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December 21, 2014

December 21, 2014

Posted by **Anonymous** on Sunday, February 13, 2011 at 5:00pm.

- chemistry -
**DrBob222**, Sunday, February 13, 2011 at 7:01pmk = 0.693/t

_{1/2}

Substitute k into the equation below:

ln(No/N) = kt.

No = initial = 120g

N = final = 7.50g

k from above.

Solve for t.

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