def Vm_to_rho(Vm, MW):
return (Vm)**-<NUM_LIT:1>*MW/<NUM_LIT><EOL>
r'''Calculate the density of a chemical, given its molar volume and
    molecular weight.

    .. math::
        \rho = \frac{MW}{1000\cdot VM}

    Parameters
    ----------
    Vm : float
        Molar volume, [m^3/mol]
    MW : float
        Molecular weight, [g/mol]

    Returns
    -------
    rho : float
        Density, [kg/m^3]

    Examples
    --------
    >>> Vm_to_rho(0.000132, 86.18)
    652.8787878787879

    References
    ----------
    .. [1] Poling, Bruce E. The Properties of Gases and Liquids. 5th edition.
       New York: McGraw-Hill Professional, 2000.