The gas arsine, AsH3, decomposes as follows. 2 AsH3(g) equilibrium reaction arrow 2 As(s) + 3 H2(g) In an experiment at a certain temperature, pure AsH3(g) was placed in an empty, rigid, sealed flask at a pressure of 392.0 torr. After 48 hours the pressure in the flask was observed to be constant at 488.0 torr. (a) Calculate the equilibrium pressure of H2(g). WebAssign will check your answer for the correct number of significant figures. atm (b) Calculate Kp for this reaction. WebAssign will check your answer for the correct number of significant figures.