At 1700 °C, the equilibrium constant, Kc, for the following reaction is 4.10 × 10-4.

N2(g) + O2(g) <--> 2NO(g)

What percentage of O2 will react to form NO if 0.475 mol of N2 and 0.475 mol of O2 are added to a 0.805-L container and allowed to come to equilbrium at 1700 °C?