The van der waals forces of attraction between
molecules always become stronger as molecular size
1) decreases, and the distance between the
molecules increases
2))increases, and the distance between the
molecules decreases
3) decreases, and the distance between the
molecules decreases
4) increases, and the distance between the
molecules increases

Explanation:

3 ) decreases, and the distance between the

molecules decreases

that tool would be a compass

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.