The combustion of hexane at a certain temperature, produces heat according to the following equation: 2 C6H14 (l) + 19 O2 (g) 12 CO2 (g) + 14 H2O (g) Hrxn = 1328 kJ/mol How many grams of C6H14 (l) are used when 1040 kJ of heat is released? Report your answer to THREE significant figures. Do not include units.