Anthracene is a hydrocarbon obtained from coal (and as such its structure resembles a small fragment of graphite). The empirical formula of anthracene is C7H5. To find its molecular formula you dissolve .500 g in 30.0 g of benzene. The boiling point of the pure benzene is 80.10 degrees C, whereas the solution has a boiling point of 80.34 degrees C. What is the molecular formula of anthracene?