A car has a fuel efficiency of 7.0 L/100 km. Assume complete combustion of a fuel that is a 9.0/1.0 mixture of octane and heptane, by volume, and these constituents have densities of 0.703 and 0.684 g/mL, respectively. What mass of CO 2 is emitted for the trip to Toronto, 375 km? (2 marks) 2.5.7 x 10+g b.56.81 kg OC 15 x 104 g O d. 15.15 kg A solution containing 5.22 g of sulfuric acid reacts with 6.25 g of sodium hydrogen carbonate (sodium bicarbonate) to produce sodium sulfate, carbon dioxide and water. The limiting reactant is the bicarbonate. (2 marks) O True O False An early trial of SpaceX's Draco thruster used equal masses of the two reactants for this reaction: 4 CH6N2 + 5 N204 12 H20 + 4CO2 +9N2 What is the mass of unburned reactant for each kg of the fuel mixture? (2 marks) a. CH6N2, 299 g Ob.CH6N2 : 56.98 OCCH6N2, 117g Od.N204 , 62.3 g