Question: how many moles of water are produced from 4 moles of nh3?
Answer: The reaction above can mean: 4 molecules of NH3 reacts with 5 molecules of O2 to produce 4 molecules of NO and 6 molecules of H2O. It also can be interpreted as: 4 moles of NH3 reacts with 5 moles of O2 to produce 4 moles of NO and 6 moles of H2O.