Is sand a solid, liquid or gas?
whats your claim ( state what you think)
whats your evidence ( give two examples)
reasoning ( explian the science behind your cilam)

the product of the pressure and volume is also constant

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.