7/201 8 11:59 PM 17.7/100 O 3/7/2018 12:43 PM -Print Calculator ë³´ Periodic Table ion 6 of 26 Sapling Learning macmillan learning Consider the following reaction PCI5(g) ê·¼ PCI3(g) + C12(g) K, = 0.0420 The concentrations of the products at equilibrium are [PCb] = 0.130 M and [Cb]-0210 M. What is the concentration of the reactant, PCIs, at equilibrium? Number [PC15] =