How To Calculate Density Of Liquid From Molecular Weight. No more than 1% of pentanes, heavier hydrocarbons and oxygen + x12m12 divide m by 22.414 and that is your normal density in kg/m3.

Now, when you have mole fractions and you know each component's mole weight, you can calculate the mole weight of gas mixture, by applying the abovementioned formula: In order to calculate density, you need to know the mass and volume of the item. The average molecular weight is no more than 20.0 kg/kmol;