Please help!!!!

A chemical reaction between X2 (red) and Y2 (blue) produces XY (red-blue). All species are in a gasecus state. The picture shown here represents the equilorium miaturn. Calculate the equilibrium constant for the balaniced reaction betwoen one mole of each reagent. Express your answer numerically to three significant figures. The following reaction was performed in a sealed vessel at 753C : H2(g)+I2(g)2HI(g) Initially, only H2 and I2 were present at concentrations of [H2]=3.90M and [I2]=2.45M. The equilibrium concentration of I2 is 0.0800M. What is the equilibrium constant, Kc, for the reaction at this temperature? Express your answer numerically. What is the value of Kc for the decomposition of HI at 623K ? Express your answer numerically