1.

Calculate the effective molecular weight of air

Answer»

Solution :Air is a homogenous MIXTURE. It has 79% NITROGEN and 21% OXYGEN by volume.
If we take ONE mole of air,
it WOULD contian 0.79 mole of nitrogen and 0.21 mole of oxygen.
The weight of one mole of air `=0.79 xx 28+0.21 xx 32`
=28.84
Effective molecular weight of air is 28.84


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