What is the Molar Enthalpy of Neutralization in kJ/mol if 5.00 moles of HCl(aq) (acid) neutralized 5.00 moles of NaOH(aq) (base) and released 6649J of heat?

If all of your numbers are right it should be 6649 J/5.00 mol = ? J/mol but that doesn't give 57.1 kJ/mol and that is the enthalpy of neutralization.