An empty party balloon will float to the ceiling of a room once it is filled with helium.
a. what does this tell you about the density of air in the room compared to the density of helium?
b. for the balloon to float in air, what two factors might have changed about the balloon?
answer those two questions of you know the answer.

the increase of protons   hope this

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.