Answer is: N₂ + 3H₂ → 2NH₃.
NH₃ is ammonia.
The Haber process is procedure for the production of ammonia, in this process atmospheric nitrogen (N₂) is converted to ammonia (NH₃):
N₂ + 3H₂ ⇄ 2NH₃ ΔrH = -92 kJ/mol.
In one molecule of the ammonia, there are three hydrogen atoms and one nitrogen atom.
Ammonia (NH₃) shows basic character in aqueous solution:
NH₃ + H₂O ⇄ NH₄⁺ + OH⁻.
