# Representing the Rate of Production?

1. Mar 25, 2015

### TheExibo

1. The problem statement, all variables and given/known data

Nitric oxide and oxygen gases react to form nitrogen dioxide gas in the reaction 2NO + O2 -> 2NO2

Write a mathematical expression to represent the rate of production of nitrogen dioxide: 4.0x10-3mol/(L*s)

2. Relevant equations

r=k[X]m[Y]n

3. The attempt at a solution

Not really sure where to start off.

2. Mar 25, 2015

### Quantum Defect

Something is missing here.

3. Mar 26, 2015

### epenguin

Maybe you don't understand what the question is - nor do we - is this verbatim and from where?

Maybe all they want is d[NO2]/dt = - d[NO]/dt = -½ d[O2]/dt = 4.0 X 10-3

which you did not write because it was too obvious?

4. Mar 26, 2015

### Staff: Mentor

I would argue even just $r=4.0 \times 10^{-3} \frac {mol}{L \times s}$ qualifies as a correct answer

5. Mar 26, 2015

### epenguin

Yes but sometimes it is just as well to show off a bit.