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Define mole fraction. A solution contain...

Define mole fraction. A solution contains 90 gms of `H_(2)O`, 6.4 gms of methanol and 18.4 gms of glycerol. What is the mole fraction of glycerol ( M.W of `H_(2)O = 18`, M.W of methanol = 32, M.W of glycerol = 92) ?

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