A sample of H2O is broken apart into O2 and H2 gas. Samples were collected over the water. The temperature is 22 degrees C. The external pressure was 760.0 mm Hg. The water level difference is 4.5 cm. The vapor pressure of water is 19.6 mm Hg. Determine the pressure of the H2 and O2 combined? Density of Hg is 13.6g/mL; density of H2O is 1.00g/mL.