You're asking about the reaction of nitrogen and hydrogen to form ammonia:

N₂(g) + 3H₂(g) → 2NH₃(g)

This reaction breaks 3 moles of H₂ bonds for every mole of N₂ reacted. Here's why:

* Reactant: Each hydrogen molecule (H₂) contains one H-H bond.

* Stoichiometry: The balanced equation shows that 3 moles of H₂ are required to react with 1 mole of N₂.

* Bond Breaking: To form ammonia (NH₃), the H-H bonds in hydrogen molecules must be broken.

Therefore, 3 moles of H₂ bonds are broken for every mole of N₂ that reacts.