Rate of Reaction

[chemistry123456]

4NH3 + 5O2 - 4NO3 + 6H20

The average rate of production of nitrogen monoxide is 6.2*10^-2 mol/(L.s).
What is the average rate of change in the concentration of ammonia?
________
Cheap airsoft pistols (http://airsoft-shop.info/categories/pistols/)

[hana]

4NH3 + 5O2 - 4NO3 + 6H20

The average rate of production of nitrogen monoxide is 6.2*10^-2 mol/(L.s).
What is the average rate of change in the concentration of ammonia?

I'm not sure , but,
4NH3 + 5O2 ---------> 4NO + 6H20
assuming this is the rate determining step,
you must consider the stoic. mole ratios here.According to the ratio,
For 1 molecule of NO to be formed,1 molecule of NH3 has to be used up,
therefore the rate of formation of NO = rate of reaction of NH3.

hope this helps