Polyacetylene is an addition polymer with the structure shown here. Draw the structure of the monomer. H H

Q: What are the two types of layer arrangement in metals? Which has the closer packing?

A: The two types of layer arrangement in metals are : Simple Squares Hexagonal Layer   Simple squares…

Q: Predict the effect (if any) of an increase in temperature on the electrical conductivity of (a) a…

A: Conductor: It passes the current. There is no energy space between valence band and conduction…

Q: Indicate whether each statement is true or false:(a) Elastomers are rubbery solids.(b) Thermosets…

A: True, Elastomers are rubbery solids.they have elastic property. These polymer chain are held…

Q: 2. Polyacrylonitrile is an addition polymer made from the acrylonitrile monomer, CH2CHCN. How many…

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Q: Which one below is true for polymers? Density of crystalline polymer is less than that of amorphous…

A: Given statement is :  Which one below is true for polymers ?  a). Density of crystalline polymer is…

Q: Teflon is an addition polymer formed from the monomer shown here. Draw the structure of the polymer.…

A: Polymers are the macro molecules which are made by the repetition of smaller units. These small…

Q: What is a polymer? What is the difference between a polymer and a copolymer?

A: Polymer is a type of natural or synthetic substance which is composed of large number of…

Q: ( CH3-C-OH CH3 CH=C-CH=CH

A: Addition polymer is a polymer that is  formed by the simple linking of the monomers without  the co-…

Q: The repeat unit in polystyrene coffee cup has CH,CHCH,. If the molar mass of the polymer is 3.5 x 10…

A: Given that : molar mass of polymer = 3.5 × 105 g/mol Repeating unit is C6 H5 CHCH2  We need to find…

Q: How does crystallinity affect the mechanical properties of materials.

A: Crystallinity affects the mechanical properties of materials. The thermal performances and…

Q: Why are isotactic or syndiotactic polymers often more attractive for materials development?

A: An isotactic polymer is a compound that is formed by the arrangement of monomers in the same pattern…

Q: (a) Describe the structure of each of the categories of polymers below. Thermoplastics: Thermosets:…

A: (a)  Thermoplastics: When we talk about thermoplastic structure the  flexible linear chain can be…

Q: This refers to copolymer type whose arrangement of particles is  A-A-A-A-B-B-B-B ...

A: Copolymer type whose arrangement of particles is---   A-A-A-A-B-B-B-B ...

Q: a) Draw the structure of 3 units of the polymer Kevlar

A: The monomers are mentioned below:

Q: A material that has the ability to stretch a great deal and then return to its original dimensions…

A: In material science and physics, elasticity is the ability of a material to resist a distorting…

Q: Polyacrylonitrile (PAN) is an addition polymer with the struc- ture shown here. Draw the structure…

A: Polymers: A macromolecule which composed of a large number of small repeating units called monomers.…

Q: What is the primary structural feature necessary for a molecule to make it useful in a condensation…

A: Several monomers or oligomers (molecules with 3-10 repeating units), react with one another and…

Q: The polycarbonate Lexan is a condensation polymer and has the structure shown here: CH3 CH3 Assuming…

A: Applying concept of polymer formation by polymerization.

Q: (a) What molecular features make a polymer flexible? (b) Ifyou cross-link a polymer, is it more…

A: a. The intermolecular attractions between the polymeric chains can be hydrogen bonding, dispersion…

Q: How many T+ holes are there in a CCP unit cell?

A: Cubic close packed (CCP) also named as face centered cubic ( FCC) have same lattice but different…

Q: Why is there no isotactic or syndiotactic form of polyethylene? a. monomer is symmetrical b.…

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Q: Gold has a face-centered cubic arrangement with a unit cell edge length of 4.08 Å.  How many moles…

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Q: One of the critical properties of polymers is elasticity. The ability of many polymeric materials to…

A: Crystallinity  means the degree of structural order in a solid. The atoms are arranged in a regular…

Q: In NaCl crystal, Cl– ions form the cubic close packing. What sites are occupied by Na+ ions

A: In NaCl crystal Cl- ions forms FCC (face centre cubic) and Na+ occupies Octahedral voids (OHV).

Q: how many repeating un itc are there in the polymer ! what type of addition polymer? H. CI

A: Polymers are very large molecules with high molecular masses which are composed of many small…

Q: What is the difference between a crystal system and a mineral group?

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Q: Cubic structure) calculate volume, mass, and atomic mass given that an FCC lattice has density of…

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Q: The repeat unit in polystyrene coffee cup has C6H5CHCH2. If the molar mass of the polymer is…

A: Degree of polymerization = Molecular weight of polymerMolecular weight of monomer   Molar mass of…

Q: How do an addition polymer and a condensation polymer differ from each other?

A: Addition polymer:Polymers made up of monomers which are added without the loss of any atoms known as…

Q: The polymer Kevlar, a condensation polymer, is used as reinforcementin car tires, strings of archery…

A: Polymers Polymers are the structures made of long and repeating chains of molecules. The repeating…

Q: PVC is an example of which type of solid?

A: PVC is polyvinyl chloride.

Q: wHAT are polycrystalline solids.? Give any two examples

A: A solid consisting of individual grains or crystallites in which each grain has a long range ordered…

Q: What is polymerization and name two types of polymerization and describe them

A: Polymers: These are the chemical substances that consist of macromolecules made from smaller…

Q: Do higher molecular weight polymers have a higher elastic modulus? Give a reason why this is/is not…

A: An elastic modulus can be defined as the amount of resistance a substance would put to stop getting…

Q: Q3:- What are the types of defects in crystalline structure? Explain with example and with any kind…

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Q: An addition polymerization forms the polymer originallyused as Saran™ wrap. It has the following…

A: Please find below the polymerisation reaction along with the monomer.

Q: Polyacrylonitrile (PAN) is an addition polymer with the structure shown here. Draw the structure of…

A: Polyacryolnitrile (PAN) is an addition polymer which is used in many commercial purposes. Like it is…

Q: What polymer substances are used to join the surfaces of 2 solid materials into one solid material?

A: Polymers application:

Q: The following structure represents a monomer. H C = C CI CH, a. Deduce the chemical name of the…

A:

Q: Polymorphism can exist in any crystalline material, not just molecular solids. True or false?…

A: Crystalline solids are those where a long-range order is present in the arrangement of constituent…

Q: 15. Network polymer structure is. O A. Branching. B. Liner. C. Cross-link.

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Q: ng your own words explain why ceramics are stronger and stiffer than polymers

A: Polymers can be defined as a large macromolecule made up from large number of monomers