There is growing interest in the extraction of natural gas, whose primary component is methane (CH4), from unusual sources. One such source is natural gas hydrates, where gas molecules are trapped in lattices made of water molecules, found deep in oceans and in per- mafrost (frozen ground at higher latitudes). The feed characteristics of subsea clathrate (pure vapor at ambient T and high P) are given: Component Label Flowrate (kmol/h) K-value HO 1 CH4 C2H6 C3H8 CO2 H2S 25 0.25 55 4,000 20 3,500 5 3,000 10 1.50 5 0.20 Determine whether an isothermal flash stage can remove 99.9% of H2S as part of the liquid exit stream under these conditions. Show all the steps. How much methane is lost in the liquid exit stream?