A flexible container at an initial volume of 4.11 L4.11 L contains 9.51 mol 9.51 mol of gas. More gas is then added to the container until it reaches a final volume of 11.7 L.11.7 L. Assuming the pressure and temperature of the gas remain constant, calculate the number of moles of gas added to the container.

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .