9. A 5.53 gram iron (Fe) sample reacted with 3.17 grams of oxygen (O2). The products of this reaction were rust (Fe, O3). According to the law of conservation of mass, what is
the combined mass of iron and oxygen to form rust?
(NEED ANSWER ASAP DUE
TN 10/16 11:59PM!

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.