Explain why,exhaled air contains more water vapour than inhaled air

Mark the following statements as True or False. Correc the false statements Exhaled air has more percentage of CO_(2) than inhaled air.

Select the appropriate option and complete the following paragraph. (pressure, high, steam, unsaturated, saturated, vapour, low, temperature, volume) For a given ___ of air, at a specific temperature, there is a limit on how much water vapour the air can contain. If the amount exceeds this limit, the excess ___ converts into water· droplets. When the air contains maximum possible water vapour, it is said to be ___ with vapour at that temperature. The amount of vapour needed to saturate the air depends on ___ of the air. If air temperature is ___ , it will need less vapour to saturate the air. If the vapour contained in air is less that the maximum limit, then the air is said to be --- .

[A] : Many desert mammals cool the exhaled air in their noses , before it is expelled out through nostrills . [R] : The moisture condensation in the nose and is not lost as water vapours along with the exhaled air .

The gas or vapour heavier than air is

Explain why, when air a taken in and let out during breathing, the lungs always contain a residual volume of air.

On a certain humid day, the mole fraction of water vapour in air at 25^(@)C is 0.0287. If total pressure of air is 0.977 bar, calculate the partial pressure of water vapour in air and relative humidity if vapour pressure of water at 25^(@)C is 0.0313 bar.

Explain why , air is considered a mixture and not a compound.