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February 28, 2015

February 28, 2015

Posted by **Peter** on Tuesday, April 27, 2010 at 2:42pm.

- chemistry -
**DrBob222**, Tuesday, April 27, 2010 at 3:37pmk = 0.693/t

_{1/2}= 0.693/28 = ??

Substitute for k in the equation below.

ln(No/N) = kt

ln(4.00/N) = k(112)

Solve for N.

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