If the actual yield of the reaction was 75% instead of 100%, how many molecules of o2 would be present after the reaction is over? the# of no2 molecules is 8 if it goes through completion and no is the limiting reactant.

the answer is   c.) 1575 j.

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.