13147 12 Analysis of an organic compound shows that it contains carbon, hydrogen and oxygen and it has a relative molecular mass of 88. The empirical formula of the compound can be determined using percentage composition by mass. The molecular formula can then be established using the relative molecular mass. (a) Define the term molecular formula. [1] (b) (i) The compound contains 54.5% carbon and 9.1% hydrogen by mass. Determine the empirical formula of the compound. [3] (ii) Determine the molecular formula of the compound. [1] 13147 [Turn over (iii) Using your answer to (b)(ii), suggest a possible structure for the compound which contains only one functional group and another structure which contains two different functional groups. [2]