def flate_pump_feed(F_mass, rho_F):
    """
    Calculates the flow rate pump for Feed.
    Parameters
    ----------
    F_mass : float
        The flow rate of Feed, [kg / s]
    rho_F : float
        The density of feed, [kg / m**3]
    Returns
    -------
    flate_pump_feed : float
        The flow rate pump for Feed [m**3 / s]
    References
    ----------
    &&&&
    """       
    return (F_mass / rho_F)