Ammonia burns in oxygen according to the following equation: 4NH3 + 3O2 → 2N2 + 6H2O
How many moles of nitrogen gas are generated by the complete reaction of 8.56 moles of ammonia?

Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). if you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 390 mmhg, what is the pressure (in mmhg) of water vapor after the reaction is completed (temperature and volume do not change).