How many moles of N2 are needed to react with 7.32 mol of O2?

At elevated temperatures in an automobile engine, N2 and O2 can react to yield NO, an important cause of air pollution.

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h