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May 25, 2015

Homework Help: Chemistry

Posted by Help on Monday, March 15, 2010 at 6:17pm.

Problem:

In a first order decomposition reaction, 50% of a compound decomposes in 10.5 minutes. What is the rate constant of the reaction?

The solution my professor gave says:

k = .693 / 10.5min

Where did the .693 come from?

Thanks

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