Lars observes a substance to be a solid and to float in water at room temperature (23°c). based on the given properties, which substance is the most likely identity of this sample? substance melting point (°c) boiling point (°c) density at room temperature (g/cm3) carbon tetrachloride -22.9 76.7 1.59 cetyl alcohol 49.3 344 0.811 dichlorobenzene 53.5 174 1.25 sulfur hexafluoride -64 -50.8 0.00617 a. carbon tetrachloride b. cetyl alcohol c. dichlorobenzene d. sulfur hexafluoride