[Marty101]

  Hi I really need help on this question that i have been on for hours.

It asks, how many moles of Nitric oxide are formed, and how many moles of which reactant are left over mixing?

4NH3 + 5O2 = 4NO + 6H2O
12 mol of ammonia with 14 mol of oxygen.

I think that i have the limiting reagent but i am not sure, can you check?

Is it 12/4=3 and (14/5=2.8, being the liniting reagent)?
 :apple:
If this is right can you please show me how to find out how to get the number of Nitric oxide moles.

I am truelly thankful if you can help me out with this question.
Bye.

[Albert]

You found out oxygen is the limiting reagent: this means, a certain quantity of ammonia doesn't react.

My hint is: concentrate on oxygen and, in particular, on the ratio moles of oxygen/ moles of nitric oxide.