Feed consist from EDC $($Ethylene Dichloride$)$ and water enter to reboiled absorber column at rate $116\mathrm{.}2$kmo$\frac{l}{h},$ which equal to $10815\mathrm{.}99k\frac{g}{h})$ the mole fraction of EDC in feed equal$))=(0\mathrm{.}9264$ and water $)=(0\mathrm{.}0736.$ Calculate the number of stage needed in reboiled Absorber to obtain EDC at purity $0\mathrm{.}995.$

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