air is a mixture of O2 and N2 which O2 is 20percent by mole and N2 is present 80 percent mole find the average molecular mass of air
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It is relative to hydrogen gas.
Molar mass is the average molar mass of the mixture .
Avg. Molar mass=M1*n1 +M2n2 +…./n1+n2
Avg. Molar mass=8*28 +2*32/10
=28.8
Hence vapour density will be 14.4
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