If air contains N2 and O2 in volume ratio 4:1, the average vapuor density of air is

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Q. Air contains nitrogen and oxygen in the volume ratio of

4 : 1

The average vapour density of air is :

Q. Air contains

N_{2}

and

O_{2}

4 : 1

ratio by volume. Approximate molecular weight of air (g/mole) is:

Assuming that dry air contain $79 % N_{2} a n d 21 % O_{2}$ by volume. Find the density of moist air at $25^{\circ}$ C and 1.0atm when the relative humidity is $60 %$ . The vapour pressure of water at $25^{\circ}$ C is 23.76 mm Hg.

Q. Ratio of solubilities of gases

N_{2}

O_{2}

in water from air at

25^{o}

and 1 atm will be if air is 20% by volume of

O_{2}

and 80% by volume of

N_{2}

is:

Given :

K_{H} (N_{2}) = 2 \times 10^{4} a t m

K_{H} (O_{2}) = 10^{4} a t m

Q. Air contains 79%

N_{2}

and 21%

O_{2}

by volume. If the pressure is

750

H g

, the partial pressure of

O_{2}

is:

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