## 15.21

$aR \to bP, Rate = -\frac{1}{a} \frac{d[R]}{dt} = \frac{1}{b}\frac{d[P]}{dt}$

Michelle Choi 1H
Posts: 8
Joined: Tue Nov 17, 2015 3:00 am

### 15.21

For the solution to this problem, is it possible to use grams/liter to solve for [A] initial? The manual finds the ratio of [A] initial compared to [A] final but I tried using the measurement of mg that was given and still got the same answer.

Chem_Mod
Posts: 19542
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 882 times

### Re: 15.21

There should be no unit as g/L in this question. If you are asking whether you should use g or mg to solve the problem, the answer is that for first order reaction you can use either as long as you mantain it through the whole process.