(5.00 Puanlar) 9. A laboratory experiment was performed to identify an unknown chemical, using the table for physical properties of common substances below. The unknown chemical was found to be sparingly soluble in water and completely soluble in ethanol and cyclohexane. Which of the following substances can be the unknown chemical? Physical Properties of Some Common Laboratory Chemicals Compound Boiling point Solubility Ethanol Cyclohexane Water 3 3 $ $ $ 9 1 i Density ( cm) 0.79 0.81 0.81 1.49 0.90 0.66 0.79 0.96 0.80 0.79 0.87 Acetone 2-Butanone Cyclohexene Chloroform Ethyl acetate n-Hexane Methyl alcohol Naphthalene 1-Propanol 2-Propanol Toluene Melting point (C) -95.0 -86.0 -104.0 -63.5 -84.0 -95.0 94.0 80.5 -127.0 -90.0 -95.0 5 56 80 83 61 77 69 65 218 97 82 111 sp i S 5 SP i BP 5 3 3 $ 3 S 3 3 a) Toluene b) 2-propanol c) Methyl alcohol d) Ethyl acetate Bos brak