Two well-known organic chemicals are benzene, C₆H₆, and propane, C₃H₈. Benzene has a molecular weight of 78.11 g/mol and propane 44.096 g/mol, where the molecular weight is a useful measure in chemistry and is defined as the mass of 1 mole (Avogadro’s number) of molecules or atoms. Determine the molecular weight (in g/mol) of pure hydrogen and pure carbon.