Question 3 In the industrial furnace industry, the air-fuel ratio is an important measure for anti- pollution. You have asked for a stoichiometric mixture to see if there's enough air to completely burn all of the fuel. These are the required specifications: A sample of bituminous coal gave the following ultimate analysis by mass: 82.5% C, 5.1% H2, 5.8% O2, 2.8% N, 3.8% ash. Calculate the stoichiometric of air and fuel ratio. [10 marks]