Explain how the molar mass of a gas affects the rate at which the gas diffuses and effuses

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.

Which samples do the atoms have the least kinetic energy

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?