1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution Firstly I tried to find the empirical formula: C : H : O 65.2 : 8.75 : 26.05 (mass) 5.43 : 8.75 : 1.628 (mol) 3.34 : 5.37 : 1 10 : 16 : 3 C10H16O3 This gives a molecular mass of 184. Now with the structure: It has to contain a carboxylic group. I used trial and error and got the structure 1-hydroxyl dec-2-eneoic acid. Not sure if my naming is correct but the general idea is that there is a alcohol on one end, carboxylic acid on the other end, and a double bond in between. This means the mol of NaOH used = mol of compound Q. NaOH = 0.000237 mol. Molar mass = 0.0437 gram/0.000237 mol = 184.38 g/mol. Does this seems correct? Cheers!