Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. An industrial chemist studying this reaction fills a tank with of sulfur dioxide gas and of oxygen gas, and when the mixture has come to equilibrium measures the amount of sulfur trioxide gas to be 4.3 mol.
Calculate the concentration equilibrium constant for the reaction of sulfur dioxide and oxygen at the final temperature of the mixture. Kc=