def ideal_gas_law(T, Vm):
    """
    Calculates the pressure in atm of a gas given the temperature in K and the molar volume in L/mol using the ideal gas law
    
    Parameters
    ----------
    T: Temperature in Kelvin (a constant - double or int)
    Vm: Molar Volume (a constant - double or int)
    
    Returns
    -------
    double
        pressure of an ideal gas in atm according to the ideal gas law (given the temperature and the molar volume)
    
    Examples
    --------
    T = 298.15 K
    v = 2.0 L/mol
    Input: ideal_gas_law(298.15, 2.0)
    Output: 12.231603749999998 

    """
    R = 0.08205 #L*atm/K/mol
    return R * T / Vm