(b) If the atmosphere in the afternoon during a humid period (% Relative Humidity = 80) is at 90°F (barometer reads 738 mm Hg) while at night it is at 68°F (barometer reads 745 mm Hg), then find out...

Extracted text: (b) If the atmosphere in the afternoon during a humid period (% Relative Humidity = 80) is at 90°F (barometer reads 738 mm Hg) while at night it is at 68°F (barometer reads 745 mm Hg), then find out what percent of the afternoon air is deposited as dew at night? Data given as Vapor pressure of H2O at 90°F = 36.1 mm Hg Vapor pressure of H2O at 68°F = 17.5 mm Hg