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### 15.17

Posted: Mon Mar 05, 2018 11:59 pm
The question includes 3 reactant, where A is first order, B is second order, and C is zero order. Part b asks you to write the rate law for the reaction. The answer doesn't include the concentration of C, but if we did in an answer, would it be marked wrong?

### Re: 15.17

Posted: Tue Mar 06, 2018 12:00 am
Most likely would be marked wrong, as C being zero order indicates that it will not affect the rate law. If you wrote it, you would prob have to put a 0 as the exponent for it, otherwise it would look like it was being included as first order according to C.

### Re: 15.17

Posted: Tue Mar 06, 2018 12:01 am
Most likely, because zero order reactions don't contribute to reaction rate.

### Re: 15.17

Posted: Tue Mar 06, 2018 12:13 am
Because C is essentially zero order, it would be best to leave it off. If you leave it in the rate law, you would need an exponent of a 0 essentially indicating that it is independent of rate. Otherwise, you would probably be marked off for leaving it in.