1. Empirical formula calculation for compound X using mass data 2. Molecular formula determination of compound X from mass spectrum 3. Functional group identification using bromine water and sodium carbonate 4. Analysis of mass spectrum peaks at m/z 41 and 45 5. Reaction mechanism and mechanism for 1-bromopropane with sodium hydroxide 6. Dehydration of propane-1,2,3-triol to propenal with a solid catalyst