A power plant is driven by the combustion of a complex fossil fuel having the formula C₁₁H7S. Assume the air supply is composed of only N₂ and O₂ with a molar ratio of 3.76:1.00, and the N₂ remains unreacted. In addition to the water produced, the fuel’s C is completely combusted to CO₂ and its sulfur content is converted to SO₂. In order to evaluate gases emitted at the exhaust stacks for environmental regulation purposes, the nitrogen supplied with the air must also be included in the balanced reactions.

a. Including the N₂ supplied in the air, write a balanced combustion equation for the complex fuel assuming 100% stoichiometric combustion (i.e., when there is no excess oxygen in the products and the only C-containing product is CO₂). Except in the case of N2, use only integer coefficients.

b. Including N₂ supplied in the air, write a balanced combustion equation for the complex fuel assuming 120% stoichiometric combustion (i.e., when excess oxygen is present in the products and the only C-containing product is CO₂). Except in the case of N₂, use only integer coefficients.

c. Calculate the minimum mass (in kg) of air required to completely combust 1700 kg of C₁₁H₇S.

d. Calculate the air/fuel mass ratio, assuming 100% stoichiometric combustion.

e. Calculate the air/fuel mass ratio, assuming 120% stoichiometric combustion.