@property<EOL><INDENT>def rhogs(self):<DEDENT>
return [i.rhog for i in self.Chemicals]<EOL>
r'''Pure-component gas-phase mass densities of the chemicals in the
        mixture at its current temperature and pressure, in units of [kg/m^3].

        Examples
        --------
        >>> Mixture(['benzene', 'toluene'], ws=[0.5, 0.5], T=320).rhogs
        [3.1333721283939258, 3.8152260283954584]