code: def Vmg(self):
          r'''Gas-phase molar volume of the mixture at its current
          temperature, pressure, and composition in units of [m^3/mol]. For
          calculation of this property at other temperatures or pressures or
          compositions, or specifying manually the method used to calculate it,
          and more - see the object oriented interface
          :obj:`thermo.volume.VolumeGasMixture`; each Mixture instance
          creates one to actually perform the calculations.
  
          Examples
          --------
          >>> Mixture(['hexane'], ws=[1], T=300, P=2E5).Vmg
          0.010888694235142216
          '''
          return self.VolumeGasMixture(T=self.T, P=self.P, zs=self.zs, ws=self.wsf Vmg(self):
          r'''Gas-phase molar volume of the mixture at its current
          temperature, pressure, and composition in units of [m^3/mol]. For
          calculation of this property at other temperatures or pressures or
          compositions, or specifying manually the method used to calculate it,
          and more - see the object oriented interface
          :obj:`thermo.volume.VolumeGasMixture`; each Mixture instance
          creates one to actually perform the calculations.
  
          Examples
          --------
          >>> Mixture(['hexane'], ws=[1], T=300, P=2E5).Vmg
          0.010888694235142216
          '''
          return self.VolumeGasMixture(T=self.T, P=self.P, zs=self.zs, ws=self.ws)
docs: r'''Gas-phase molar volume of the mixture at its current
          temperature, pressure, and composition in units of [m^3/mol]. For
          calculation of this property at other temperatures or pressures or
          compositions, or specifying manually the method used to calculate it,
          and more - see the object oriented interface
          :obj:`thermo.volume.VolumeGasMixture`; each Mixture instance
          creates one to actually perform the calculations.
  
          Examples
          --------
          >>> Mixture(['hexane'], ws=[1], T=300, P=2E5).Vmg
          0.010888694235142216