Will mark a ! calculate the value of the equilibrium constant, kc, for the reaction below, if 0.208 moles of sulfur dioxide gas, 0.208 moles of oxygen gas and 0.625 moles of sulfur trioxide gas are present in a 1.50-liter reaction vessel at equilibrium. 2so2(g) + o2 (g) 2-way arrow 2so3 (g) a) kc = 3.91 x 10-1 b) kc = 4.34 x 101 c) kc = 6.47 x 101 d) kc = 1.47 x 102