A certain natural gas has the following volumetric analysis: 72% CH4, 9% H2, 14% 2, 2% O2 and 3% CO2. This gas is now burned with theoretical air that enters the combustion chamber at 20C, 1 atm and 80 percent relative humidity. The combustion is complete and the products have a total pressure of 1 atm. a) Assuming dry air, determine the chemical reaction equation. b) Determine the chemical reaction equation for the humid air. c) Determine the dew-point temperature of the products.