A velocidade do som no mesmo material: * a) é maior, quando a temperatura diminui.
b)não depende da temperatura do material.
c)é maior, quando a temperatura aumenta.

a) é maior, quando a temperatura diminui.

i think   the answer is c hope i'm right

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.