Homework Help: Chemistry

Posted by Josh on Saturday, July 16, 2011 at 6:38pm.

The rate constant for this first order reaction is 0.0470 s-1 at 400 C.

A TO Products

After how many seconds will 11.0% of the reactant remain?

Chemistry - DrBob222, Sunday, July 17, 2011 at 12:02am
This is the long way around but this is what I would do.
ln(No/N) = kt
I would call No = 100
Then N would be 11.
Substitute k and solve for t in seconds.

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