The boiling point of ethanol, CH3 CH₂OH, is 78.500 °C at 1 atmosphere. K₁(ethanol) = 1.22 °C/m In a laboratory experiment, students synthesized a new compound and found that when 11.78 grams of the compound were dissolved in 268.1 grams of ethanol, the solution began to boil at 78.697 °C. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight they determined for this compound? g/mol

5. A 2.50 g sample of naphthalene, C₁0H8, was dissolved in 100 g of benzene. What is the freezing point of the benzene solution? The freezing point of pure benzene is 5.45°C and its Kf is 5.07°C/m.

The boiling point of benzene, C6H6 , is 80.100 °C at 1 atmosphere. Kb (benzene)= 2.53C/m. In a laboratory experiment, students synthesized a new compound and found that when 14.93 grams of the compound were dissolved in 252.2 grams of benzene, the solution began to boil at 80.619 °C. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight they determined for this compound?   The freezing point of ethanol, CH3CH2OH, is -117.300 °C at 1 atmosphere. Kf(ethanol) = 1.99 °C/m. In a laboratory experiment, students synthesized a new compound and found that when 12.91 grams of the compound were dissolved in 271.5 grams of ethanol, the solution began to freeze at -117.406 °C. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight they determined for this compound?

The freezing point of benzene, C,Hg, is 5.500 °C at 1 atmosphere. Kf(benzene) = 5.12 °C/m In a laboratory experiment, students synthesized a new compound and found that when 13.39 grams of the compound were dissolved in 298.4 grams of benzene, the solution began to freeze at 4.703 °C. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight they determined for this compound? g/mol

The freezing point of water, H2O, is 0.000 °C at 1 atmosphere. Kf(water) = 1.86 °C/mIn a laboratory experiment, students synthesized a new compound and found that when 11.94 grams of the compound were dissolved in 217.1 grams of water, the solution began to freeze at -1.702 °C. The compound was also found to be nonvolatile and a non-electrolyte.What is the molecular weight they determined for this compound?

The boiling point of benzene, C6H₁, is 80.100 °C at 1 atmosphere. K₁ (benzene) = 2.53 °C/m In a laboratory experiment, students synthesized a new compound and found that when 11.45 grams of the compound were dissolved in 248.8 grams of benzene, the solution began to boil at 80.428 °C. The compound was also found to be nonvolatile and a non- electrolyte. What is the molecular weight they determined for this compound? || g/mol

What is the freezing point of an aqueous FeCl₃ solution made to be 0.81 m FeCl₃? (Kf for water is 1.86 °C/m)