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March 4, 2015

March 4, 2015

Posted by **Anonymous** on Saturday, December 1, 2012 at 4:44pm.

- Chemistry -
**DrBob222**, Saturday, December 1, 2012 at 4:49pmk = 0.693/t

_{1/2}

Substitute and solve for k.

ln(No/N) = kt

Pick any convenient number for No, such as 100.

Then N = 1/8 that or 12.5

k = from above.

Solve for t in years if half life is in years.

- Chemistry -
**Anonymous**, Saturday, April 26, 2014 at 10:13am716

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