Aasume you have a sample of polystyrene that was determined to contain 38% crystallinity. The density...
Aasume you have a sample of polystyrene that was determined to contain 38% crystallinity. The density of 100% crystalline PE 1.00 g/cm^3 and the density of 100% amorphous PE is 0.855 g/cm^3. What is the density of this 38% crystalline sample?
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Aasume you have a sample of polystyrene that was determined to
contain 38% crystallinity. The density...
The density and associated percent crystallinity for two polypropylene materials are as follows: p (g/cm) crystallinity...
The density and associated percent crystallinity for two polypropylene materials are as follows: p (g/cm) crystallinity (%) 0.904 62.8 0.895 54.4 Compute the densities of totally crystalline and totally amorphous polypropylene.
Current Attempt in Progress The density and associated percent crystallinity for two polytetrafluoroethylene materials are as...
Current Attempt in Progress The density and associated percent crystallinity for two polytetrafluoroethylene materials are as follows: plg/cm3) crystallinity (%) 2.111 61.4 2.280 77.2 (a) Compute the density of totally crystalline polytetrafluoroethylene. g/cm3 (b) Compute the density of totally amorphous polytetrafluoroethylene. Pa = g/cm3 (c) Determine the percent crystallinity of a specimen having a density of 2.28 g/cm % crystallinity =
Can you guys please help me with this Percent crystallinity may also be determined using outputs...
Can you guys
please help me with this
Percent crystallinity may also be determined using outputs from DSC. a. Explain how DSC works. b. Explain how you can determine percent crystallinity from DSC. c. Using this article: http://www.perkinelmer.com/Content/appicationnotes/app thermaicrystailinitythermo plastics.pdf and the information below. Determine the percent crystallinity in another PET sample: i. Delta H_m = 10J/g ii. Delta H_c =5J/g
please only do H-M. i have done everything else. 2. During the acid catalyzed polymerization of...
please only do H-M. i have done everything else.
2. During the acid catalyzed polymerization of terephthalic acid and ethylene glycol, some fraction of methanol (CH-OH) is incorporated, but no more ester bonds can be formed. a. Based on the above, what is the extent of reaction, p? b. How does fav determine whether a linear or network polymer is formed as p nears 1? c. Why do you believe the polymer in this reaction will be a gel-network or...
2. During the acid catalyzed polymerization of terephthalic acid and ethylene glycol, some fraction of methanol...
2. During the acid catalyzed polymerization of terephthalic acid and ethylene glycol, some fraction of methanol (CH-OH) is incorporated, but no more ester bonds can be formed. a. Based on the above, what is the extent of reaction, p? b. How does fav determine whether a linear or network polymer is formed as p nears 1? c. Why do you believe the polymer in this reaction will be a gel-network or linear chains? d. What is fivg, the average number...
QUESTION 1 A semi-crystalline nylon with a degree of crystallinity of 25% has a density of 1.5 g/cm^3. Nylon has a crystalline density of 1.8 g/cm^3. What is its amorphous density in grams per centi...
QUESTION 1 A semi-crystalline nylon with a degree of crystallinity of 25% has a density of 1.5 g/cm^3. Nylon has a crystalline density of 1.8 g/cm^3. What is its amorphous density in grams per centimeters cubed? 1 points QUESTION 2 Which defect is NOT common between metals and polymers? tie molecules vacancies screw dislocations interstitial defects 0.5 points QUESTION 3 Which one is not a characteristic of a plastic polymer? a. Low stress but very large strains b. Tensile strength...
A 23.20-g sample of a gaseous compound containing carbon, oxygen, and chlorine is determined to contain...
A 23.20-g sample of a gaseous compound containing carbon, oxygen, and chlorine is determined to contain 2.76 g C, 4.29 g O, and 16.15 g Cl. What is this compound’s percent composition?
E AFTER COMPLETING LAB. ANSWER IN SPACE PROVIDED. Suppose the heat of neutralization had been determined using a glass beaker instead of a polystyrene coffee cup How would the measured value have...
E AFTER COMPLETING LAB. ANSWER IN SPACE PROVIDED. Suppose the heat of neutralization had been determined using a glass beaker instead of a polystyrene coffee cup How would the measured value have been affected? The heat of combustion of octane, C,H,. can be measured in a way similar to the method youC used to measure the heat of neutralization. The bomb calorimeter is used instead of a coffee cup. The reaction is 2C,H,1)+ 25 O, (g) 16 CO, (g) +...
At a large electronics corporation, the HR Director determined that 38% of the employees have at...
At a large electronics corporation, the HR Director determined that 38% of the employees have at least one degree. A random sample of five of these employees is taken, and X is the number of employees in the sample with at least one degree. I. a. Justify that X can be modeled as binomial. b. State the possible values of c. Compute the probability distribution of X. Round each probability to 3 decimal places. d. State the meaning of P(3)...
2) The EPA has determined that the maximum safe level of nitrate ion in water is...
2) The EPA has determined that the maximum safe level of nitrate ion in water is 10 ppm. Suppose a sample of tap water was determined to have a nitrate ion concentration of 95 ppb. Assume the density of water is 1.00 g/mL a) What is the concentration of nitrate ion in units of ppm? Is it safe to drink? b) What is the concentration of nitrate ion in units of mg/ml? c) What mass of nitrate ion is in...
The density and associated percent crystallinity for two polypropylene materials are as follows: p (g/cm) crystallinity (%) 0.904 62.8 0.895 54.4 Compute the densities of totally crystalline and totally amorphous polypropylene.
Current Attempt in Progress The density and associated percent crystallinity for two polytetrafluoroethylene materials are as follows: plg/cm3) crystallinity (%) 2.111 61.4 2.280 77.2 (a) Compute the density of totally crystalline polytetrafluoroethylene. g/cm3 (b) Compute the density of totally amorphous polytetrafluoroethylene. Pa = g/cm3 (c) Determine the percent crystallinity of a specimen having a density of 2.28 g/cm % crystallinity =
Can you guys
please help me with this
Percent crystallinity may also be determined using outputs from DSC. a. Explain how DSC works. b. Explain how you can determine percent crystallinity from DSC. c. Using this article: http://www.perkinelmer.com/Content/appicationnotes/app thermaicrystailinitythermo plastics.pdf and the information below. Determine the percent crystallinity in another PET sample: i. Delta H_m = 10J/g ii. Delta H_c =5J/g
please only do H-M. i have done everything else.
2. During the acid catalyzed polymerization of terephthalic acid and ethylene glycol, some fraction of methanol (CH-OH) is incorporated, but no more ester bonds can be formed. a. Based on the above, what is the extent of reaction, p? b. How does fav determine whether a linear or network polymer is formed as p nears 1? c. Why do you believe the polymer in this reaction will be a gel-network or...
2. During the acid catalyzed polymerization of terephthalic acid and ethylene glycol, some fraction of methanol (CH-OH) is incorporated, but no more ester bonds can be formed. a. Based on the above, what is the extent of reaction, p? b. How does fav determine whether a linear or network polymer is formed as p nears 1? c. Why do you believe the polymer in this reaction will be a gel-network or linear chains? d. What is fivg, the average number...
E AFTER COMPLETING LAB. ANSWER IN SPACE PROVIDED. Suppose the heat of neutralization had been determined using a glass beaker instead of a polystyrene coffee cup How would the measured value have been affected? The heat of combustion of octane, C,H,. can be measured in a way similar to the method youC used to measure the heat of neutralization. The bomb calorimeter is used instead of a coffee cup. The reaction is 2C,H,1)+ 25 O, (g) 16 CO, (g) +...
At a large electronics corporation, the HR Director determined that 38% of the employees have at least one degree. A random sample of five of these employees is taken, and X is the number of employees in the sample with at least one degree. I. a. Justify that X can be modeled as binomial. b. State the possible values of c. Compute the probability distribution of X. Round each probability to 3 decimal places. d. State the meaning of P(3)...
2) The EPA has determined that the maximum safe level of nitrate ion in water is 10 ppm. Suppose a sample of tap water was determined to have a nitrate ion concentration of 95 ppb. Assume the density of water is 1.00 g/mL a) What is the concentration of nitrate ion in units of ppm? Is it safe to drink? b) What is the concentration of nitrate ion in units of mg/ml? c) What mass of nitrate ion is in...
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