The equilibrium constant of the chemical reaction N2 (gas) + 3H2 (gas) = 2NH3 (gas) at T = 673K equals Kr = 0.8*10^-5. To calculate Xc, will the formation of reaction products under the perfectly reversible process if the initial partial pressures of substances in Pa level PNH3 = 0.9*10^5; PN2 = 0.34*10^5; PH2 = 0.72*10^5?