An absorption column for laboratory use has been carefully constructed so that it has exactly 4 equilibrium stages and is being used to measure equilibrium data. Water is used as the solvent to absorb ammonia from air. The system operates isothermally at \(300 \mathrm{~K}\) and \(1 \mathrm{~atm}\). The inlet water is pure distilled water. The ratio of \(L / V=1.2\), inlet gas concentration is \(0.01 \mathrm{~mol}\) fraction ammonia; the measured outlet gas concentration is \(0.0027 \mathrm{~mol}\) fraction ammonia. Assuming that Henry's law applies, calculate the slope of the equilibrium line.