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20 g of non-electrolyte, non-volatile so...

20 g of non-electrolyte, non-volatile solute `(C_(x)H_(2x)O_(6))` when dissolved in 100 gm water at `100^(@)C`, lowers the vapour pressure of solution by `(1)/(100)`th of the vapour pressure of pure water at this temperature. What is formula of the compound ?

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