A chemist must prepare 900.mL of 131μ M aqueous zinc oxalate ZnC2O4 working solution. He'll do this by pouring out some 168μmolL aqueous zinc oxalate stock solution into a graduated cylinder and diluting it with distilled water. Required:
Calculate the volume in of the zinc oxalate stock solution that the chemist should pour out. Be sure your answer has the correct number of significant digits

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 .