The haber process is a method for the production of ammonia, an important chemical intermediate. the reaction for this process is: n2 + 3h2 → 2nh3. when the equation is correctly interpreted in terms of moles, how many moles of h2 will react with one mole of n2?

In Haber process, N₂ reacts with H₂ and produces NH₃. The balanced reaction for the Haber process is 
N₂(g) + 3H₂(g) → 2NH₃(g)

The stoichiometric ratio between N₂ and H₂ is 1 : 3

This means, reacted moles of N₂ = reacted moles of H₂ / 3

Hence, 3 moles of H₂ react with 1 mole of N₂ to form 2 moles of NH₃.

They carry out the exchange of gases as we breathe ( oxygen and carbon dioxide).