The best approach depends on the details of the problem you are working on, but here are some options.
Values for molar volume can easily be turned into densities. Molar volume is the volume occupied by a mole, V/n. Density is the mass per volume m/V. Mass is the number of moles times the...
If you are going to use the Soave Redlich Kwong or the Peng Robinson equation of state, you are probably best off using the usual mixing rules for those equations rather than using pseudo critical values.
Here is an outline of what I am talking about for the SRK.
For the pure components:
a =...
