1 This question is about compounds with the molecular formula C,H,0. (a) What is the percentage by mass of each element in C,HgO? * (b) Three different compounds, A, B and C, have the molecular formula C,H,0. Information about these three compounds includes: all three compounds have infrared absorptions at about 3500 cm- the infrared spectra of A and B each contain a peak at about 1650 cm-1,while that of C does not only A has a branched carbon chain • B is the E-isomer of a pair of stereoisomers. Deduce a possible displayed formula for each of the compounds A, B and C.IN TH You must use all the information and the Data Booklet to fully justify each of your structures.(6)

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