code: def Tracer_CMFR_N(t_seconds, t_bar, C_bar, N):
      
      return C_bar*E_CMFR_N(t_seconds/t_bar, N)
docs: Used by Solver_CMFR_N. All inputs and outputs are unitless. This is
      The model function, f(x, ...). It takes the independent variable as the
      first argument and the parameters to fit as separate remaining arguments.
  
      :param t_seconds: List of times
      :type t_seconds: float list
      :param t_bar: Average time spent in the reactor
      :type t_bar: float
      :param C_bar: Average concentration (mass of tracer)/(volume of the reactor)
      :type C_bar: float
      :param N: Number of completely mixed flow reactors (CMFRs) in series, must be greater than 1
      :type N: int
  
      :return: The model concentration as a function of time
      :rtype: float list
  
      :Examples:
  
      >>> from aguaclara.research.environmental_processes_analysis import Tracer_CMFR_N
      >>> from aguaclara.core.units import unit_registry as u
      >>> Tracer_CMFR_N([1, 2, 3, 4, 5]*u.s, 5*u.s, 10*u.mg/u.L, 3)
      <Quantity([2.96358283 6.50579498 8.03352597 7.83803116 6.72125423], 'milligram / liter')>