Which of the following is a naturally occurring polymer? Select one: a. nylon b. perspex c. polyurethane d. silk e. tery...
Which of the following is a naturally occurring polymer? Select one: a. nylon b. perspex c. polyurethane d. silk e. terylene
Homework Answers
Ans.-d.Silk
Silk is naturally occuring polymer and can be extracted from nature . The monomer of silk polymer is amino acid .
The other emaining polymers i.e. nylon ,perspex,polyurethane,terylene are synthectic polymers ,not occure in nature. They are human made polymers.
Add Answer to:
Which of the following is a naturally occurring polymer? Select one: a. nylon b. perspex c. polyurethane d. silk e. tery...
Which of the following is a naturally occurring polymer? Select one: O a. nylon Io O...
Which of the following is a naturally occurring polymer? Select one: O a. nylon Io O b. perspex C. polyurethane d. silk o e. terylene Which of the following amino acids have sidechains which can form hydrophobic pockets where London Dispersion Forces between sidechains predominate? Select one: a. Aspartic acid O b. Serine C. Tyrosine d. Isoleucine o e. Glutamine
Which of the following is a natural polymer? Select one: O a. Rubber b. Polyester c....
Which of the following is a natural polymer? Select one: O a. Rubber b. Polyester c. Silk d. Rubber & polyester e. Rubber & silk
Question 11 1 pts Which of the following is not a natural polymer? cellulose protein silk...
Question 11 1 pts Which of the following is not a natural polymer? cellulose protein silk starch nylon
Predict the structure of the polyurethane polymer. Question Step-growth polymerization is another method used to make countless polymers, such as polyethylene terephthalate (PET), Nylon, Kevlar, and p...
Predict the structure of the
polyurethane polymer.
Question Step-growth polymerization is another method used to make countless polymers, such as polyethylene terephthalate (PET), Nylon, Kevlar, and polyurethane Let's take a look at how polyurethanes are made Step 1: The alcohol (ethylene glycol) is deprotonated to form an alkoxide Step 2: The alkoxide attacks the electrophilic carbon of the isocyanate Step 3: The nitrogen is protonated to give a carbamate intermediate Step 4: Another alkoxide attacks the isocyanate (red) to form...
for a rate please 15. Complete the following Cannizzaro reaction C-H кон 16. Nylon is a C) polycarbonate. A) polyurethane. B) polyester. whereas the exterior is 17. The interior of a micelle is B)...
for a rate please
15. Complete the following Cannizzaro reaction C-H кон 16. Nylon is a C) polycarbonate. A) polyurethane. B) polyester. whereas the exterior is 17. The interior of a micelle is B) hydrophilic, hydrophilic D) hydrophobic, hydrophilic A) hydrophilic, hydrophobic
15. Complete the following Cannizzaro reaction C-H кон 16. Nylon is a C) polycarbonate. A) polyurethane. B) polyester. whereas the exterior is 17. The interior of a micelle is B) hydrophilic, hydrophilic D) hydrophobic, hydrophilic A) hydrophilic, hydrophobic
Which of the following is a synthetic polymer? Select one: a. cellulose O b. polyisoprene C....
Which of the following is a synthetic polymer? Select one: a. cellulose O b. polyisoprene C. DNA d. poly(hexamethyleneadipamide) e. enzymes
Many caterpillars construct cocoons from silk, one of the strongest naturally occurring materials known. Each thread...
Many caterpillars construct cocoons from silk, one of the strongest naturally occurring materials known. Each thread is typically 2.0 μm in diameter, and the silk has a Young's modulus of 4.0 × 10 9 N / m 2 . a)Assuming that there is no appreciable space between the parallel strands, how many strands N would be needed to make a rope 9.0 m long that would stretch only 1.02 cm when supporting a pair of 91-kg mountain climbers? N=_____strands b)...
Many caterpillars construct cocoons from silk, one of the strongest naturally occurring materials known. Each thread...
Many caterpillars construct cocoons from silk, one of the strongest naturally occurring materials known. Each thread is typically 2.0 um in diameter, and the silk has a Young's modulus of 4.0 x 109 N/m2 Assuming that there is no appreciable space between the N =1087222 strands parallel strands, how many strands N would be needed to make a rope 8.0 m long that would stretch only 1.06 cm when supporting a pair of 87-kg mountain climbers? Again assuming that there...
Many caterpillars construct cocoons from silk, one of the strongest naturally occurring materials known. Each thread...
Many caterpillars construct cocoons from silk, one of the strongest naturally occurring materials known. Each thread is typically 2.0 μm in diameter, and the silk has a Young's modulus of 4.0 × 10 9 N / m 2 . Assuming that there is no appreciable space between the parallel strands, how many strands N would be needed to make a rope 8.8 m long that would stretch only 1.06 cm when supporting a pair of 85 -kg mountain climbers? N...
31. Identify the stereochemistry present in the following polymer H CNNC (a) atactic (b) isotactic (c)...
31. Identify the stereochemistry present in the following polymer H CNNC (a) atactic (b) isotactic (c) stereotactic (d) syndiotactic (e) polytactic 32. Which of the following is an example of step-growth polymerization? (a) polyvinyl chloride (b) polyurethane (c) polyacrylonitrile (d) polystyrene (e) polymethylmethacrylate
Which of the following is a naturally occurring polymer? Select one: O a. nylon Io O b. perspex C. polyurethane d. silk o e. terylene Which of the following amino acids have sidechains which can form hydrophobic pockets where London Dispersion Forces between sidechains predominate? Select one: a. Aspartic acid O b. Serine C. Tyrosine d. Isoleucine o e. Glutamine
Which of the following is a natural polymer? Select one: O a. Rubber b. Polyester c. Silk d. Rubber & polyester e. Rubber & silk
Question 11 1 pts Which of the following is not a natural polymer? cellulose protein silk starch nylon
Predict the structure of the
polyurethane polymer.
Question Step-growth polymerization is another method used to make countless polymers, such as polyethylene terephthalate (PET), Nylon, Kevlar, and polyurethane Let's take a look at how polyurethanes are made Step 1: The alcohol (ethylene glycol) is deprotonated to form an alkoxide Step 2: The alkoxide attacks the electrophilic carbon of the isocyanate Step 3: The nitrogen is protonated to give a carbamate intermediate Step 4: Another alkoxide attacks the isocyanate (red) to form...
for a rate please
15. Complete the following Cannizzaro reaction C-H кон 16. Nylon is a C) polycarbonate. A) polyurethane. B) polyester. whereas the exterior is 17. The interior of a micelle is B) hydrophilic, hydrophilic D) hydrophobic, hydrophilic A) hydrophilic, hydrophobic
15. Complete the following Cannizzaro reaction C-H кон 16. Nylon is a C) polycarbonate. A) polyurethane. B) polyester. whereas the exterior is 17. The interior of a micelle is B) hydrophilic, hydrophilic D) hydrophobic, hydrophilic A) hydrophilic, hydrophobic
Which of the following is a synthetic polymer? Select one: a. cellulose O b. polyisoprene C. DNA d. poly(hexamethyleneadipamide) e. enzymes
Many caterpillars construct cocoons from silk, one of the strongest naturally occurring materials known. Each thread is typically 2.0 um in diameter, and the silk has a Young's modulus of 4.0 x 109 N/m2 Assuming that there is no appreciable space between the N =1087222 strands parallel strands, how many strands N would be needed to make a rope 8.0 m long that would stretch only 1.06 cm when supporting a pair of 87-kg mountain climbers? Again assuming that there...
31. Identify the stereochemistry present in the following polymer H CNNC (a) atactic (b) isotactic (c) stereotactic (d) syndiotactic (e) polytactic 32. Which of the following is an example of step-growth polymerization? (a) polyvinyl chloride (b) polyurethane (c) polyacrylonitrile (d) polystyrene (e) polymethylmethacrylate
Most questions answered within 3 hours.
-
The energy required to remove an electron from a surface of a
solid element is called...
asked 14 minutes ago -
How would you train your employees to avoid risks of using
mobile devices?
asked 36 minutes ago -
Assume Kw = 1.01 ✕ 10−14
For pure water, we can calculate [H3O+ ] = [OH...
asked 1 hour ago -
Suppose that on a temperature scale X, water boils at 203.0°X
and freezes at -105.7°X. What...
asked 2 hours ago -
BaS crystallizes in a cubic unit cell with S2- ions on each
corner and each face....
asked 2 hours ago -
A. 0≤P(Oi)≤10≤P(Oi)≤1 for each i
B. P(Oi)≤0P(Oi)≤0
C. P(Oi)=1+P(OCi)P(Oi)=1+P(OiC)
D. P(Oi)≥1P(Oi)≥1
If an experiment consists of...
asked 4 hours ago -
A battery has an emf of 9.20V and an internal resistance of 1.20
ohm. a)What resistance...
asked 4 hours ago -
The area of an elastic circular loop decreases at a constant
rate, dA/dt = −6.60×10−3 m2/s...
asked 5 hours ago -
The denaturation of proteins can be described by the
equilibrium
F⇌U
where F and U represent...
asked 7 hours ago -
Please answer what the maximum and minimum force is, and the
angle on the ion is...
asked 7 hours ago -
implement a program that reads a number of rows and a symbol.
The program will draw...
asked 7 hours ago -
Assume that when adults with smartphones are randomly selected,
45% use them in meetings or classes....
asked 7 hours ago