Heat of Combustion?

To generate energy, the human body "burns" glucose, C6H12O6, whose molar mass = 180.156 g/mol. Burning 3.99 g of glucose produces 19.0 kJ of heat. What is the molar heat of combustion of glucose (kJ/mol)? (Remember to include the correct sign.)

Answer:
Determine how much energy is liberated by 1 g and multiply this by the molar mass. the Answer will be in kj/mol and it willcarry a negative sign becuase the reaction is exothermic.
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