5.6.1 Density and Molar Mass of a Gaseous Substance

Ideal gas equation can be rearranged as follows:

n/V = p/RT

Replacing n by m/M we get

m/MV = p/RT

d/M = p/RT (where d is the density)

On rearranging the above equation we get the relationship for calculating molar mass of a gas.

M= (d RT)/p



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