@property<EOL><INDENT>def rholm_STP(self):<DEDENT>
Vml = self.Vml_STP<EOL>if Vml:<EOL><INDENT>return <NUM_LIT:1.>/Vml<EOL><DEDENT>return None<EOL>
r'''Molar density of the mixture in the liquid phase at 298.15 K and 101.325 kPa,
        and the current composition, in units of [mol/m^3].

        Examples
        --------
        >>> Mixture(['water'], ws=[1]).rholm_STP
        55344.59086372442