Calculate the molar flow rate of the air

3. Natural gas is a non-renewable hydrocarbon used as a source of energy for electricity generation by burning it in a furnace with excess air. One hundred kmol/h of a gas containing 94.40 mole% methane, 3.40 mole% ethane, 0.60 mole% propane, and 1.60 mole% butane is to be burned with 30% excess air. a) Calculate the required molar flow rate of the air. (15 marks) b) Calculate the extent of reaction for methane, ethane, propane, and butane. (20 marks) 3. Natural gas is a non-renewable hydrocarbon used as a source of energy for electricity generation by burning it in a furnace with excess air. One hundred kmol/h of a gas containing 94.40 mole% methane, 3.40 mole% ethane, 0.60 mole% propane, and 1.60 mole% butane is to be burned with 30% excess air