Final answer:
In a solution of benzoic acid in benzene with a molar mass nearing 244, the benzoic molecules exist primarily as dimers formed through hydrogen bonding.
Step-by-step explanation:
When a solution of benzoic acid is dissolved in benzene and exhibits molecular association with a molar mass approaching 244, the benzoic acid molecules will exist predominantly in dimerized form. This dimerization occurs because of the association of two benzoic acid molecules through hydrogen bonding. In this associated form, the combined molar mass of the dimer is approximately 244 g/mol, which is roughly twice the molar mass of a single benzoic acid molecule (about 122 g/mol).