Posted by **Adrianna** on Wednesday, March 23, 2011 at 12:59am.

The half-life of the first order reaction, A to products, is 53.2 s. What was the original concentration, (A)0 in moles per liter, if after 1.8 minutes, the concentration of A is 0.0783 moles per liter?

Not sure whether to use integrated rate law or half life law?

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