[" Heat of formation of "SO_(2)" is "-298kJ" .What is "],[" the heat of combustion of "4g" of "S" ? "]

Heat of formation off SO_(2) is -298 kJ. What is the heat of combustion of 4 g of S?

Heat of formation of SO_2 "is" -298 kJ . What is the heat of formation of 4 g of SO_2 ?

Heat of combusion of methane is -800 kJ. What is the heat of combustion of 4xx10^(-4)kg of methane?

On combustion carbon forms two oxides CO and CO_(2) . Heat of formation of CO_(2) is -393.5kJ and that of CO is -110.5kJ. Heat of combustion of CO is