February 19, 2017

Homework Help: Chemistry

Posted by Chris on Monday, January 21, 2013 at 9:53am.

This problem is 1st order for half life.

How long would it take for the concentration of cyclopropane to decrease to 50% of its initial value? to 25% of its initial value?

Rate constant is 9.2/s

I set up like this...

t1/2= 0.693/9.2/s= 0.075s at 50%

I can't figure out how to get the answer of 0.151s from 25%...

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