Answered: Calculate the number-average molar mass…

Calculate the number-average molar mass and the weight-average molar mass of a mixture of equal amounts of two polymers, one having M = 62 kg mol−1 and the other M = 78 kg mol−1.

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 96QRT

See similar textbooks

Related questions

Q: A sample of 2.05 g of polystyrene of uniform polymer chainlength was dissolved in enough toluene to…

A: Since the osmotic pressure is given by Here the polystyrene is non ionisable molecule. Hence i = 1…

Q: Consider solutions of Cr(NO3)3-9H2O in water. The solubility of Cr(NO3)3-9H₂O in water at 15 °C is…

A: Given that the solubility of Cr(NO3)3.9H2O in water is 208 g per 100 g of water at 15oC. Saturated…

Q: ) Calculate the normality and formality of a potassium permanganate solution of which 35.00 mL are…

A: The question is based on the concept of quantitative estimation. we have to calculate formality and…

Q: 1. The solubility of L-glutamic acid (an amino acid) in water has been determined to be as follows…

A: Solubility: When the maximum amount of solute is dissolve in the solvent is called solubility. On…

Q: The solubility in water of ionic compound X is measured and found to be 0.174 at 25. °C. Calculate…

A: Please find the answer given below:

Q: certain substance X has a normal boiling point of 102.5°C and a molal boiling point elevation…

A: Given -> Normal boiling point= 102.5°C Molal boiling point elevation constant…

Q: When 184. mg of a certain molecular compound X are dissolved in 85. g of formamide (NH,COH), the…

Q: At 20.0 °C, the vapor pressure of cyclohexane, a nonpolar hydrocarbon, is 66.9 torr and that of…

Q: 2.00 g of an unknown protein was dissolved in water to make 0.100 L of solution. An osmotic pressure…

Q: Calculate the mass of ethylene glycol C2H6O2 that must be added to 1.00 kg of ethanol C2H5OH to…

A: When we add non volatile solute in a pure solvent than the vapour pressure of pure solvent decreases…

Q: At 20.0 °C, the vapor pressure of cyclohexane, a nonpolar hydrocarbon, is 66.9 torr and that of…

A: Raoult's Law states that vapor pressure of a solution formed by volatile solute and volatile solvent…

Q: A certain liquid X has a normal freezing point of 3.30°C and a freezing point depression constant…

A: We know that, depression in freezing point is given by, ΔTf =…

Q: 2. Calculate the enthalpy of hydration of CuSO, if 16.34 g of CUSO, dissolves in water and gives out…

A: Determine the energy released for dissolving per mole of CuSO4. Find the moles of CuSO4. When 0.102…

Q: was made by dissolving 479.32 g or aluminum AIC13) in enough water to make 500.0 solution. The…

Q: Distinguish between dispersion methods and condensation methods for preparing colloidal systems.

A: Dispersion methods: that is, by breaking down larger particles. For example, paint pigments are…

Q: What will happen the sulfate ions supplied to the winogradsky column’s mud as (NH4)2SO4?

A: Given : The winogradsky column’s mud as (NH4)2SO4 To find: What will happen the sulfate ions…

Q: Determine the osmotic pressure of a 0.0125 M solution of CrCl3 at 25 °C. Assume 100% dissociation of…

A: The osmotic pressure is expressed as :

Q: A sample of 2.05 g of polystyrene of uniform polymer chain length was dissolved in enough toluene to…

A: The answer to the following question is-

Q: A certain liquid X has a normal freezing point of −6.30°C and a freezing point depression constant…

Q: What is the boiling point elevation of a solution consisting of 125.1 g sucrose, C12H22O11,…

A: To solve this problem first we have to calculate the Molality of the solution then by using the…

Q: The diving atmosphere used by the U.S. Navy in its undersea Sea-Lab experiments consisted of 0.036…

A: Since the mass of component = mass of sample X mole fraction of sample Hence mas of oxygen = mole…

Q: A solution of ethylene glycol (C2H6O2) in water is 3.981 molar and has a density of 1.0296 g mL–1 .…

A: Molarity of solution is the number of moles of solute present per liter of solution.Percent, by…

Q: The ubiquitous single-cell yeast (S. cerevisiae) is roughly spherical with a “typical” diameter of 5…

A: 1 mole of any element contains NA number of molecules in it. The mass of 1 mole of the element is…

Q: The molal boiling point elevation constant =Kb·0.53°C·kgmol−1 for a certain substance X. When 7.3g…

A: We will calculate boiling point of pure solvent.

Q: Suppose you are presented with a clear solution of sodium thiosulfate, Na2S2O3. How could you…

A: A solution is said to be saturated when it cannot dissolve any extra solute in it. A solution is…

Q: 0.15 mol of sugar was mixed with 4.6 mol of water. Calculate the vapor pressure of this solution.…

A: Number of moles of sugar (solute) = 0.15 mol Number of moles of water (solvent) = 4.6 mol Total…

Q: Calculate the vapor pressure of ethanol, CH₃CH₂OH, in a water solution containing 72.5% ethanol by…

A: The objective of this question is to calculate the vapor pressure of ethanol in a water solution at…

Q: The normal boiling point of cyclohexane is 80.74 °C. At 20.00 °C, the vapour pressure of cyclohexane…

A: Given, The normal boiling point of cyclohexane is 80.74 °C.At 20.00 °C, the vapour pressure of…

Question

Calculate the number-average molar mass and the weight-average molar mass of a mixture of equal amounts of two polymers, one having M = 62 kg mol⁻¹ and the other M = 78 kg mol⁻¹.

Definition Definition Large and very high-molecular-weight substances that consist of hundreds to thousands of repeating units. Polymers are also known as macromolecules. Number-average-molecular weight is the measuring system for the polymers.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 4 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

The molal boiling point elevation constant =Kb·0.53°C·kgmol−1 for a certain substance X. When 7.3g of urea NH22CO are dissolved in 200.g of X, the solution boils at 120.5°C. Calculate the boiling point of pure X. Round your answer to 4 significant digits.
The freezing point of CCl4 was lowered by 0.52 K when 50 grams of a chemical were added to the solvent. Calculate the compound's molar mass. Kf of tetrachloromethane are equal to 30 kilograms per mole.
Suggest an explanation for the observations that propanol, C3H7OH, is miscible with water and that tricarbon octahydride, C3H8, is not soluble in water.
Write the net ionic equation for 3HNO3(aq)+Al(OH)3(S) = Al(NO3)3(aq)+3H2O(l) Express your answer as a balanced net ionic equation. Identify all of the phases in your answer.
the partial molar volumes of acetone and chloroform in a mixture in which the mole fraction of CHCl3 is 0.4693 are 74.166cm3/mol and 80.235 cm3/mol, respectively. What is the volume of a solution of mass 1.000 kg?
A water contains 50.40 mg · L−1 as CaCO3 of carbon dioxide, 190.00 mg · L−1 as CaCO3 of Ca2+ and 55.00 mg · L−1 as CaCO3 of Mg2+. All of the hardness is carbonate hardness. Using the stoichiometry of the lime soda ash softening equations, what is the daily sludge production (in dry weight, kg · day−1) if the plant treats water at a rate of 2.935 m3 · s−1? Assume that the effluent water contains no carbon dioxide, 30.0 mg · L−1 as CaCO3 of Ca2+ and 10.0 mg · L−1 as CaCO3 of Mg2+. Be sure to calculate the mass of CaCO3 and Mg(OH)2 sludge produced each day.
The diving atmosphere used by the U.S. Navy in its undersea Sea-Lab experiments consisted of 0.036 mole fraction O2 and 0.056 mole fraction N2, with helium (He) making up the remainder. What are the masses of nitrogen, oxygen, and helium in a 8.47 g sample of this atmosphere? Mass of oxygen = Mass of nitrogen = Mass of helium =
Chlorine gas was first prepared in 1774 by the oxidation of NaCl with MnO₂: 2NaCl(s) + 2H2SO4 (1) + MnO2 (s)→→ Na2SO4(s) + MnSO4(s) + 2H₂O(g) + Cl₂(g) Assume that the gas produced is saturated with water vapor at a partial pressure of 28.7 mm Hg and that it has a volume of 0.597 L at 27 °C and 755 mm Hg pressure.
One tenth of a kg of an aqueous solution of HCl is poured into 0.2 kg of an aqueous solution of NaOH. The mole fraction of the HCl solution was 0.1, whereas that of the NaOH solution was 0.25. What are the mole fractions of each of the components in the solution after the chemical reaction has come to completion?
Write balanced net ionic equation for CaS(aq)+ZnCl2(aq)→ZnS(s)+CaCl2(aq). Express your answer as a chemical equation. Identify all of the phases in your answer. Write balanced complete ionic equation for NaOH(aq)+HC2H3O2(aq)→H2O(l)+NaC2H3O2(aq) Express your answer as a chemical equation. Identify all of the phases in your answer. Write balanced net ionic equation for NaOH(aq)+HC2H3O2(aq)→H2O(l)+NaC2H3O2(aq) Express your answer as a chemical equation. Identify all of the phases in your answer.
2. Calculate the enthalpy of hydration of CuSO, if 16.34 g of CUSO, dissolves in water and gives out 55.51 kJ of heat (Q) and 25.17 g of CuSO4 • SH;O dissolves in water and absorbs 95.31 kJ of heat (Q). The molecular weight for CusO, is 160.00 g/mol, CusO, • SH;0 is 250.00 g/mol. Show ALL calculations-no calculations, no credit! CusO, (s) excess H,O Cu" (aq) so- (aq) AH1 + SH;0 АНа АНа excess H;0 CusO4 • SH20 (s)
Fluoridation of city water supplies has been practiced in the United States for several decades. It is done by continuously adding sodium fluoride to water as it comes from a reservoir. Assume you live in a medium-sized city of 150,000 people and that 660 L (170 gal) of water is used per person per day. What mass of sodium fluoride (in kilograms) must be added to the water supply each year (365 days) to have the required fluoride concentration of 1 ppm (part per million)that is, 1 kilogram of fluoride per 1 million kilograms of water? (Sodium fluoride is 45.0% fluoride, and water has a density of 1.00 g/cm3.)