Homework Help: chemistry

Posted by bernard on Saturday, February 18, 2012 at 11:45pm.

The reaction A -> B + C

is 1st order w/ respet to A. It's rate const k is equal to 0.343 M/s at 273K. The initial concentration of A was 0.399 M. Calculate the concentration of B after 0.185 secs have passed.

chemistry - DrBob222, Sunday, February 19, 2012 at 12:18am
Use ln(No/N) = kt.
No = 0.399
N = ?
k = 0.343
t = 0.185 sec
This will give you (A) after 0.185 sec. Since there is 1 mole B for each mole A, B should be the same.

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