In the Course of Research, a Chemist Isolates a New $\circ$

Short Answer

In the course of research, a chemist isolates a new compound with an empirical formula C₃H₃O₂. Dissolving 2.51 g of the compound in 100.g of water produces a solution with a freezing point of -0.325 ^$\circ$ C. What is the molecular formula of the compound? (For water, K_f = 1.86°C/m.)