First, write unbalanced equation for the given reaction. N2+ H2 → NH3
ii. Examine the number of atoms of each element present in the unbalanced equation.
iii. To balance hydrogen on left hand side, put coefficient ‘3’ as ‘3H2’ .N2 + 3H2 → NH3
iv. To balance hydrogen atoms onright hand side, put coefficient ‘2’ as ‘2NH3’.
N2+ 3H2 → 2NH3
v. Now consider the element nitrogen. Nitrogen atoms are 2, on both, left and right hand side.
vi. Thus, balanced chemical equation is:
N2 + 3H2 →2NH3