When 24.2 g of an organic compound known to be 62.04% C, 10.41% H, and 27.55% O by mass is dissolved in 900.0 g of cyclohexane, the freezing point is 1.78 °C. The normal freezing point of cyclohexane is 6.59 °C. What is the molecular formula for the organic compound? Assume that the organic compound is a molecular solid and does not ionize in water.
When 24.2 g of an organic compound known to be 62.04% C, 10.41% H, and 27.55%...
When 12.4 g of an organic compound known to be 70.58% C, 5.9% H, and 23.50% O by mass is dissolved in 630.3 g of cyclohexane, the freezing point is 3.58 °C. The normal freezing point of cyclohexane is 6.59 °C. What is the molecular formula for the organic compound? Assume that the organic compound is a molecular solid and does not ionize in water. K values for various solvents are given in the colligative constants table. molecular formula: [C,H,O
When 0.49 g of a molecular compound was dissolved in 20.00 g of cyclohexane, the freezing point of the solution was lowered by 3.9 degree C. Determine the molecular mass of this compound. The molar freezing point depression constant of cyclohexane 20.4 degree C/m. (K_f = 20.4 degree C/m)
A cyclohexane (c-hex) solution is prepared by fully dissolving 9.11g of a newly synthesized organic compound in 100.g cyclohexane. The freezing point of the solution is depressed by -5.80 oC from the normal freezing point of 6.55 oC for pure cyclohexane ( Kf,c-hex= 20.0 oC kg/mol , MWc-hex = 84.0 g/mol). (a) What is the molecular weight (molar mass) of the organic compound? (b) What is the vapor pressure of the cyclohexane for this solution at 298K?
At -18.6 °C, a common temperature for household freezers, what is the maximum mass of sucralose (C12H19C1308) in grams you can add to 2.00 kg of pure water and still have the solution freeze? Assume that sucralose is a molecular solid and does not ionize when it dissolves in water. Consult the table of Kf values. Answer: Solvent water benzene cyclohexane ethanol carbon tetrachloride camphor Formula Kf value* Normal freezing Kb value Normal boiling (°C/m) point (°C) (°C/m) point (°C)...
At -10.5°C, a common temperature for household freezers, what is the maximum mass of aspartame (C14H;8N2O3) you can add to 2.00 kg of pure water and still have the solution freeze? Assume that aspartame is a molecular solid and does not ionize when it dissolves in water. Consult the table of K, values. mass of aspartame: Colligative Constants Constants for freezing-point depression and boiling-point elevation calculations at 1 atm: Solvent Formula Kf value* Normal freezing Ko value Normal bolling (°C/m)...
A solution contains 10.35 g of unknown compound (non-electrolyte) dissolved in 50.0 mL of water. (Assume a density of 1.00 g/mL for water.) The freezing point of the solution is -3.26 ∘C. The mass percent composition of the compound is 60.98% C, 11.94% H, and the rest is O. What is the molecular formula of the compound?
Ascorbic acid also known as Vitamin C, is an organic compound containing C, H and O. The combustion of a 28.1 g sample of ascorbic acid produces 42.1 g CO2 and 11.5 g H2O. Determine the empirical and molecular formula of ascorbic acid. The molar mass is 176 g/mol.
A solution contains 11.70 g of unknown compound (non-electrolyte) dissolved in 50.0 mL of water. (Assume a density of 1.00 g/mL for water.) The freezing point of the solution is -7.01 ∘C. The mass percent composition of the compound is 38.70% C, 9.74% H, and the rest is O. What is the molecular formula of the compound? Express your answer as a molecular formula So far I got CH3O as my empirical, but I can't seem to figure out how...
The qualitative analysis of an organic compound showed C, H, O in combustion analysis of 0.20 34 g of a compound gave 0.5 911 g of CO2 and 0.10 36 g of H2O. the molecular weight of the compound was determined by the freezing point pressure method and was found in 210 from the above experimental results. determine the molecular formula of the compound 2. A compound is shown by qualitative analysis to contain carbon nitrogen oxygen and hydrogen combustion...
Complete combustion of 4.251 g of a compound of carbon, hydrogen, and oxygen yielded 6.337 g CO2 and 1.946 g H2O. When 20.30 g of the compound was dissolved in 348 g of water, the freezing point of the solution was found to be -0.919 °C. For water, Kfp = 1.86 °C/m. What is the molecular formula of the compound? Enter the elements in the order C, H, O molecular formula =