How does equilibrium represent the balancing of opposing processes?

When a chemical reaction comes to equilibrium the rate of the forward reaction is equal to the rate of the backward. Both the reactants consume and the products formed are occurring at an equal rate.  Thus in equilibrium the two reactions occur in opposite direction and they balance out each other.  

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.