Asample of 2.05 g of polystyrene of uniform polymer chain length was dissolved in enough toluene to form 0.100 Lof solution. The osmotic pressure of this solution was found to be 1.21 kPa at 25°C. Calculate the molar mass of the polystyrene. a) 2.35 x 104 g/mol b) 4.20x 105 g/mol c) 3.05 105 g/mol d) 4.20x 103 g/mol e) 4.20 x 104 g/mol

Asample of 2.05 g of polystyrene of uniform polymer chain length was dissolved in enough toluene to form 0.100 Lof solution. The osmotic pressure of this solution was found to be 1.21 kPa at 25°C. Calculate the molar mass of the polystyrene. a) 2.35 x 104 g/mol b) 4.20x 105 g/mol c) 3.05 105 g/mol d) 4.20x 103 g/mol e) 4.20 x 104 g/mol

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter13: The Chemistry Of Solutes And Solutions

Section: Chapter Questions

Problem 83QRT

See similar textbooks

Similar questions

Explain how molecular weight of a polymer can be determined by diluteviscosity measurements?
Polyethylene glycol 400 (PEG400) is a nonvolatile liquid polymer, which when mixed with water canbe used as a base for parenteral formulations. The designation “400” means that the molecular weightof PEG molecules is approximately 400 g/mol. Preparation with water (ΔHv = 40.7 kJ/mol) requires that the two be mixed at 56 oC, at which the equilibrium vapor pressure of pure water is 16.5 kPa. a. If 105 g of PEG400 are added to 500 g of water at 56 oC, what will the boiling temperature of the solution be?
A sample of 2.05 g of polystyrene of uniform polymer chain length was dissolved in enough toluene to form 0.100 L of solution. The osmotic pressure of this solution was found to be 1.21 kPa at 25°C. Calculate the molar mass of the polystyrene. 8 - a) 2.35 x 10 g/mol b) 4.20x 10 g/mol 3.05 x 10 g/mo 4.20x 103 g/mol 4.20 x 10 g/mol Boş bırak KÖnceki 8/20 Sonraki> Карat
1: What is the molar concentration of a 4% solution of borax? (sodium tetraborate decahydrate, Na2B4O7·10H2O) Group of answer choices A:1.5 x 10^4 M B:65.8 M C:1.049 M D:0.1049 M 2: Calculate the approximate length of PVA strand assuming that each monomer unit contributes two carbon atom diameters to the length. (1 carbon atom diameter = 154 picometers) Group of answer choices A:5.46 x 10^7 nm B:5.46 m C:308 pm D:5.46 x 10^5 pm 3: Calculate and compare the number of strands of PVA in 1.00 L of 4% PVA and the number of tetrahydroxyborate ions in 1.00 L a 4% solution of borax. Group of answer choices A:Borax has more strands than PVA B:Borax has approx. 409 more ions than PVA strands C:PVA has approx. 409 more strands than Borax ions D:Borax has approx. 209 more ions than PVA strands
Determine the mole fraction of p-dichlorobenzene dissolved in 1.00L of cyclohexane that shifts the vapor pressure from 78mmHg to 70 mmHg. Can you determine the mass of solute dissolved?
12. (3) How does a nucleus for a semi-crystalline polymer form crystalline nuclei, and how do they grow? 13. (3) Two semi-crystalline polymers with the same composition but with molecular weights that differ by a 5 are cooled to produce the same microstructure. Which will be stronger, which will be tougher, and why
A sample of 2.05 g of polystyrene of uniform polymer chainlength was dissolved in enough toluene to form 0.100 L of solution.The osmotic pressure of this solution was found to be 1.21kPa at 25 °C. Calculate the molar mass of the polystyrene.
10a. Why each polymer gives a different melting temperature, Tm?
Q.4: Draw the amorphous and crystalline phase in one microstructure. What is the effect of crystallinity on polymer?
To be a useful plastic, an amorphous polymer must be below its Tg at the ambient temperature, while crystalline polymers may be either above or below their Tg’s. Explain why.
Identify the Classification of Hazardous Wastes. example: Dichloromethane - Halogenated organic solvent (a) Benzoic acid (b) Cellulose (c) Caffeine (d) Ethanol
Some polymeric materials are opaque and some are clear and tranparent. Explain why.