Barrons SAT Subject Test Chemistry, 13th Edition

70. (C) Change the water height to the equivalent Hg height:

= 3.00 mm Hg

Adjust for the difference in height to get the gas pressure. Pressure on

the gas is

730.0 mm Hg − 3.00 mm Hg

= 727.0 mm Hg.

Vapor pressure of H 2 O at 29°C accounts for 30.0 mm Hg pressure.

Therefore,

727.0 mm Hg − 30.0 mm Hg

= 697.0 mm Hg