Will the answer be -562.5 kJ?

Question

When determining the energy of a reaction where 0.250 mol of a substance with a ΔHcomb = -2250.0 kJ/mol reacts, we perform this calculation: −2250.0 kJ 1mol = x kJ 0.250 mol OR 0.250 mol −2250.0 kJ 1mol Why can’t we simply say that the energy of the reaction is -2250.0 kJ? 

Answer 1

Yes, the answer will be -562.5 kJ. This is because each ONE mole of substance produces 2250 kJ of energy (as indicated by the ∆Hcomb) but since you don't have ONE mole, but rather you have only 0.250 mols, the energy will be 0.250 mol x -2250.0 kJ / mol = -562.5 kJ.