A polymer of large molar mass is dissolved in the organic solvent chloroform (CHCl3) at 25...
A polymer of large molar mass is dissolved in the organic solvent chloroform (CHCl3) at 25 °C, and the resulting solution rises to a final height of 7.99 cm above the level of the pure solvent, as solvent molecules pass through a semipermeable membrane into the solution. If the solution contains 3.97 g polymer per liter, calculate the molar mass of the polymer. Take the density of the solution to be 1.48 g cm-3.
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A polymer of large molar mass is dissolved in the organic solvent chloroform (CHCl3) at 25...
A polymer of large molar mass is dissolved in the organic solvent dimethylformamide (C3H7NO) at 25...
A polymer of large molar mass is dissolved in the organic solvent dimethylformamide (C3H7NO) at 25 °C, and the resulting solution rises to a final height of 17.5 cm above the level of the pure solvent, as solvent molecules pass through a semipermeable membrane into the solution. If the solution contains 5.03 g polymer per liter, calculate the molar mass of the polymer. Take the density of the solution to be 0.944 g cm-3. Molar mass polymer =
Calculate the mass of chloroform (CHCl3, an organic solvent) that contains 1.00x10^12 molecules of chloroform
Calculate the mass of chloroform (CHCl3, an organic solvent) that contains 1.00x10^12 molecules of chloroform
1) if 6.85 of glucose( C6H12O6, molar mass=180.2 g/mol) is dissolved in 155g of chloroform( CHCL3,molar...
1) if 6.85 of glucose( C6H12O6, molar mass=180.2 g/mol) is dissolved in 155g of chloroform( CHCL3,molar mass= 119.4 g/mol) , what is the boiling point of the solution. ( the boiling point of pure CHCl3 is 61.2 celsius, and Kb = 3.63 celsius/m for CHCl3) 2) a,) Liquid ammonia (boiling point = -33.4C) can be used as a refrigerant and heat transfer fluid. How much energy is needed to heat 25.0 g of NH3(l) from -65.0C to -12.0C? Heat of...
74 Percent Concentration -The amount of solute dissolved in a fixed amount of solvent is called the concentration of th...
74 Percent Concentration -The amount of solute dissolved in a fixed amount of solvent is called the concentration of the solution. Concentrations are typically expressed as Mass al.) (% m/m) which is the mass of the solute (g) divided by the mass of the solution [solute+ solvent] (g)x 1000/0; or as Volume ol.) (% v/v ) which is the volume of the solute in a fixed volume of solution (1O0mL of solution) x 1000/0; or less commonly in the laboratory,...
Eugenol is a non-electrolytic organic compound found in essential oils of several spices such as nutmeg,...
Eugenol is a non-electrolytic organic compound found in essential oils of several spices such as nutmeg, cinnamon, and basil. To extract the eugenol from a sample of spices, a researcher soaked the spices in chloroform. If 328 mg of eugenol dissolved in 10.0 g of chloroform resulting in a solution with a boiling point 0.726°C higher than pure chloroform, what is the molar mass (g/mol) of eugenol? chloroform Kb = 3.63°C/m
Polymer Chemistry: Problem 2. Polystyrene chains dissolved in cyclohexane at 35°C (theta conditions) can be separated...
Polymer Chemistry:
Problem 2. Polystyrene chains dissolved in cyclohexane at 35°C (theta conditions) can be separated by ultrafiltration according to molecular weight. The ultrafiltration process employs pressure-driven flow of a solution through a porous membrane to separate solutes by their molecular size. Molecules larger than the pore size are retained upstream of the membrane while smaller molecules pass through. In this exercise, the root mean square end-end- distance will be considered to provide an appropriate measure of molecular size. The...
Molar Mass of a Solute The freezing point of cyclohexane is 6.50°C. For cyclohexane solvent Kf=20.0....
Molar Mass of a Solute The freezing point of cyclohexane is 6.50°C. For cyclohexane solvent Kf=20.0. 0.147 g of an unknown solute is dissolved in 7.71 g of cyclohexane (C6H12). The freezing point of the solution was 3.38°C. Calculate the corresponding molar mass of the solute. g/mol 1homework pts Submit Answer Tries 0/5 To the above solution a further 0.139 g of the unknown is dissolved. The freezing point of the resulting solution was 0.85°C. Calculate the corresponding molar mass...
Molar Mass of a Solute The freezing point of cyclohexane is 6.50°C. For cyclohexane solvent Kp=20.0....
Molar Mass of a Solute The freezing point of cyclohexane is 6.50°C. For cyclohexane solvent Kp=20.0. 0.141 g of an unknown solute is dissolved in 7.90 g of cyclohexane (C6H12). The freezing point of the solution was 3.33ºC. Calculate the corresponding molar mass of the solute. g/mol 1homework pts Submit Answer Tries 0/5 To the above solution a further 0.132 g of the unknown is dissolved. The freezing point of the resulting solution was 0.75°C. Calculate the corresponding molar mass...
3a. Calculate the molar mass (in g/mol) of an unknown 1:1 electrolyte if 0.482 g dissolved...
3a. Calculate the molar mass (in g/mol) of an unknown 1:1 electrolyte if 0.482 g dissolved in 223.1 mL of water at 74.75 °C has an osmotic pressure of 54.4 mmHg. R = 0.082058 L⋅atm⋅mol−1⋅K−1. 1.00 atm = 760 mmHg. Report your answer to THREE significant figures. 3b. Calculate the required mass of an unknown nonelectrolyte (ℳ = 131.5599 g/mol) dissolved in 140.1 g of solvent that gives a solution that boils at 36.04 °C. The boiling point of the...
The molar mass of unknown molecular compound is determined using freezing point depression. The substance is...
The molar mass of unknown molecular compound is determined using freezing point depression. The substance is dissolved in benzene (C6H), an organic solvent. Use the data below to determine the molar mass of the substance. 8.65 g Mass of unknown compound Freezing point of solution Volume of benzene -10.21°C 35.0 mL 5.53°C Freezing point of benzene Density of benzene Kf for benzene 0.8765 g/mL 5.12°C/m Molar mass = g/mol
74 Percent Concentration -The amount of solute dissolved in a fixed amount of solvent is called the concentration of the solution. Concentrations are typically expressed as Mass al.) (% m/m) which is the mass of the solute (g) divided by the mass of the solution [solute+ solvent] (g)x 1000/0; or as Volume ol.) (% v/v ) which is the volume of the solute in a fixed volume of solution (1O0mL of solution) x 1000/0; or less commonly in the laboratory,...
Polymer Chemistry:
Problem 2. Polystyrene chains dissolved in cyclohexane at 35°C (theta conditions) can be separated by ultrafiltration according to molecular weight. The ultrafiltration process employs pressure-driven flow of a solution through a porous membrane to separate solutes by their molecular size. Molecules larger than the pore size are retained upstream of the membrane while smaller molecules pass through. In this exercise, the root mean square end-end- distance will be considered to provide an appropriate measure of molecular size. The...
Molar Mass of a Solute The freezing point of cyclohexane is 6.50°C. For cyclohexane solvent Kf=20.0. 0.147 g of an unknown solute is dissolved in 7.71 g of cyclohexane (C6H12). The freezing point of the solution was 3.38°C. Calculate the corresponding molar mass of the solute. g/mol 1homework pts Submit Answer Tries 0/5 To the above solution a further 0.139 g of the unknown is dissolved. The freezing point of the resulting solution was 0.85°C. Calculate the corresponding molar mass...
Molar Mass of a Solute The freezing point of cyclohexane is 6.50°C. For cyclohexane solvent Kp=20.0. 0.141 g of an unknown solute is dissolved in 7.90 g of cyclohexane (C6H12). The freezing point of the solution was 3.33ºC. Calculate the corresponding molar mass of the solute. g/mol 1homework pts Submit Answer Tries 0/5 To the above solution a further 0.132 g of the unknown is dissolved. The freezing point of the resulting solution was 0.75°C. Calculate the corresponding molar mass...
The molar mass of unknown molecular compound is determined using freezing point depression. The substance is dissolved in benzene (C6H), an organic solvent. Use the data below to determine the molar mass of the substance. 8.65 g Mass of unknown compound Freezing point of solution Volume of benzene -10.21°C 35.0 mL 5.53°C Freezing point of benzene Density of benzene Kf for benzene 0.8765 g/mL 5.12°C/m Molar mass = g/mol
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