Sampling of solid compounds For each of these compounds provide its structure, molecular mass (weight), formula (carbon first; hydrogen second; rest alphabetical) melting point, functional groups and safety aspects of the material. Look these up in the Merck Index or on-line before beginning the lab.. Compound Name, Provide Structure M.W.a Formulab mpa Functiona 1 Groupsd 1,4-dichlorobenzene naphthalene benzoic acid 2-chlorobenzoic acid salicylic acid acetylsalicylic acid oxalic acid