Why is the limitation on supplies of freshwater becoming an increasing problem despite the fact that we have desalination technologies? a) Desalination is expensive.
b) Desalination takes too long.
c) Desalination is not well understood.
d) Desalination creates too much waste salt.

where's the diagram?

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.