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October 23, 2014

October 23, 2014

Posted by **rick** on Friday, June 3, 2011 at 7:57am.

- chemistry -
**DrBob222**, Friday, June 3, 2011 at 8:02pmln(No/N) = kt

No = 100

N = 6.25

t = 24 days.

Solve for k, then substitute into the equation below.

k = 0.693/t_{1/2}and solve for t_{1/2}

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