Analysis of a compound case, 29.3% C, 1.46% H, and 69.2% Cl.
When 0.90 g of this solid was dissolved in 7.50 g of naphthalene, the solution had a freezing point of 78.0°C. The pure solvent freezes at 80.0°C, its molal freezing point constant is 6.8°C/m. Determine the molecular formula for the compound. Show your work.