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Phenanthrene, C14H10, is an aromatic hydrocarbon. Some phenanthrene is dissolved in 50.0 g of benzene and the boiling point of the resulting solution is 80.51°C. What mass of phenanthrene must have been dissolved? The Kb for benzene is 2.53 °C/m and the boiling point of pure benzene is 80.2°C.

Which of the following would be expected to have the highest solubility in water? Η Η H¬C-C-O-H Η Η O AgCl (ethanol) H₂S AgCl Η Η ΗΙ Η Η | | H=C=C=C-C-C-H | | | Η Η Η Η (pentane) Η

5.152g of Na2CO3(s) is added to 75.0mL of water at 21.20°C. When the dissolution is complete, the final temperature of the solution is measured at 25.00°C. The final volume of the solution is 75.8mL, and the density of water at 21.20°C is 0.99798g/mL. Identify the strongest intermolecular force present in Na2CO3(s): and in water:

The boiling point of chloroform, CHCl3, is 61.70°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in chloroform is aspirin.A student dissolves 14.17 grams of aspirin, C9H8O4 (180.1 g/mol), in 238.1 grams of chloroform. Use the table of boiling and freezing point constants to answer the questions below. Solvent Formula Kb (°C/m) Kf (°C/m) Water H2O 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCl3 3.67   Benzene C6H6 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02   The molality of the solution is ____________ m.The boiling point of the solution is  _________________°C.

If dissolving 1.5 g of a solute into 100 mL of water caused the temperature of the solution toincrease by 4.7 ⁰C, what would the change of temperature be if 3.0 g of the solute were dissolvedin the same volume of water? Explain.

It is desired to prepare 2.5 m^3 of a 60 mol percent methanol - water solution. Determine the volumes of methanol and water required to be mixed at ambient temperature given that the partial molar volumes of methanol and water are 58.3x10^-6m^3/mol and 17.2 x 10 m^3/mol respectively. The density of the methanol is 782.51 kg/m^3. Do not use chatgpt. Thank you!

If dissolving 1.5 g of a solute into 100 mL of water caused the temperature of the solution toincrease by 4.7 ⁰C, what would the change of temperature be if 3.0 g of the solute were dissolvedin the same volume of water? Explain.

0.0471 kg of biphenyl (C12H10) is dissolve in benzene (C&Hs) to create a solution with a total volume of 350.0 mL. (Assume the change in volume is negligible) If the boiling point of pure benzene is 80.1 °C, then what would be the boiling point of this solution in °C? (Kb for benzene is 2.53 °C/m and the density of benzene is 0.877 g/mL)

The boiling point of diethyl ether, CH3 CH₂ OCH2 CH3, is 34.50 °C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in diethyl ether is chlorophyll. A student dissolves 11.24 grams of chlorophyll, C55 H72 MgN4O5 (893.5 g/mol), in 249.4 grams of diethyl ether. Use the table of boiling and freezing point constants to answer the questions below. Solvent Water Ethanol Chloroform Benzene Formula H₂O CH3 CH₂OH CHC13 C6H6 Diethyl ether CH3 CH₂ OCH₂ CH3 The molality of the solution is The boiling point of the solution is Kb (°C/m) Kf (°C/m) 1.86 1.99 0.512 1.22 3.67 2.53 2.02 m. °C. 5.12