How can I balance this equation? N2 + H2 - - - > NH3

In the given reaction, on the left hand side, there are 2 atoms for nitrogen and two atoms for hydrogen.

On the right side of this reaction, Ammonia has one atom of nitrogen and three atoms of hydrogen.

Now, to balance this whole reaction, we need to balance the atoms on the left hand side to the right hand side of the reaction.

Thus, multiplying hydrogen molecule with two on the left side and multiplying ammonia by two will give the balanced reaction as:

The Balanced eqn is :

N₂+ 3H₂→ 2NH₃

H₂×3

NH₃×2

Hence, the balanced chemical reaction will be N