Octane, C8 H18, is burned with dry air. The molar analysis of the dry products is CO2 = 10%; CO = 0.4%; O2 = 3% and N2 = 86.6%. Determine the air fuel ratio on a mass basis and the dew point temperature of the products if the products are at 1 atm. pressure. Dry air contains 3.76 moles of nitrogen per mole of oxygen.