Two cylindrical vessels of the same height //=150 cm are connected from below by a thin tube (Fig. 76). vessel A is tightly closed with a lid, vessel B is open, at the beginning there was dry air in the vessels. At a pressure of Po = 760 mm Hg. Art. Then vessel B was filled to the brim with water at a constant temperature; the water level in vessel A turned out to be equal to h=li cm. Determine the pressure of saturating water vapor at the temperature of the experiment.

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