The density of an object is defined as mass per unit volume. mathematically we write that: d = m/v. rearrange this expression for: (a) m = ? (b) v = ?

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.