The relative humidity of air is 80% at 27 o C. If the aqueous tension at the same temperature is 27 mm Hg, then the partial pressure of water vapour in the air will be:
A 21.6 mm
B 27 mm
C 25 mm
D 23mm

The relative humidity of air is 80% at 27^(@)C . If the aqueous tension at the same temperature is 27 mm of Hg. The partial pressure of water vapour in the air will be (in mm of Hg).

750 mL of nitrogen are collected over water at 25^@C and 740 mm pressure. If the aqueous tension at this temperature is 23.8 mm Hg, calculate the mass of the dry gas.

Air contains 79% N_(2) and 21% O_(2) by volume. If the barometric pressure is 750 mm Hg . The partial pressure of oxygen is

The vapour pressure of water at room temperature is 23.8 mm Hg. The vapour pressure of an aqueous solution of sucrose with mole fraction 0.1 is equal to

Assume that air is 21% oxygen and 79% nitrogen by volume. If the barometer pressure is 740 mm, the partial pressure of oxygen is closest to which one of the following ?

The density of a gas at 27^(@)C and 760 mm pressure is 24 . Calculate the temperature at which it will be 18 , the pressure remaining constant.

The density of a gas at 27^(@)C and 760 mm pressure is 24 . Calculate the temperature at which it will be 18 , the pressure remaining constant.

The temperature and the relative humidity of air are 20^(@)c and 80% on a certain day. Find the fraction of the mass of water vapour that will condense if the temperature falls to 5^(@)C .The saturation vapour pressure are 17.5mm and 6.5mm of mercury at 20^(@)c and 5 degree C respectively.

A sample of gas is collected over water at at a barometric pressure of 751 mm Hg (vapour pressure of water at is 21 mm Hg).The partial pressure of gas in the sample collected is

A sample of gas occupies 100 mL at 27^(@)C and 740 mm pressure. When its volume is changed to 80 mL at 740 mm pressure, the temperature of the gas will be