The enlarged view of the gas-collecting tube at the end of trial 3 is shown in the diagram above. What should the student record as the volume, in mL, of H2(g) collected in trial 3? In the laboratory, the temperature is 295 K and the total pressure in the gas-collecting tube is 744.7 mmHg. If the vapor pressure of water at 295 K is 19.8 mmHg, determine the pressure of the H2(g) in the gas-collecting tube.