Suppose you reacted the 68.2 grams of oxygen gas and 47.9 grams of alunium in a closed reaction vessel. If the reaction yield 19.4 g of ammonia, what is the percent yield? Which is the limiting reactant?
What is the theoretical yield of aluminum oxide in grams?

answer: c.

explanation:

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.