Compound B\text{B}B contains chlorine and fluorine only, and has a boiling point of 11.7 ∘C11.7\ ^\circ\text{C}11.7 ∘C. 0.740 g0.740\text{ g}0.740 g of compound B\text{B}B is heated to 50 ∘C50\ ^\circ\text{C}50 ∘C. The volume of gas produced is 0.200 dm30.200\text{ dm}^30.200 dm3. Under the conditions used, 1 mol1\text{ mol}1 mol of gas molecules has a volume of 25.0 dm325.0\text{ dm}^325.0 dm3. Determine the molecular formula of compound B\text{B}B.
