A 1.00 L flask was filled with the 2.00 mol gaseous NO2 and 2.00 mol gaseous SO2 and heated. After equilibrium was reached, it was found that 1.30 mol gaseous NO was present. Suppose that the reaction SO2 (g) + NO2 (g) <--> SO3(g) + NO (g) occurs under these conditions. Estimate the value of the equilibrium constant, K, for this reaction.