i) The mass of one mole of an alcohol is 116g. What is its formula?
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If the alcohol has only one -OH group (molar mass = 17), then the rest of the molecule has a molar mass of 99 (116 - 17). The alkyl group C7H15 has exactly that! So the alcohol could be C7H15OH (heptanol) or any structural isomer thereof.
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