How do i calculate the mass of CO2 emitted per Kj of heat produced in a combustion reaction?

methanol:

1 mole CH3 OH - - > produces - - > 1 mole CO2

1 mole CO2 has a molar mass of 44.01 gh/mole

your set up is:

(44.01 g CO2) / - 726.5kJ = 0.06058g

your answer 0.06058 grams of CO2 produced per kJ released.