Polymers Questions and Answers

4 5 Explain the difference between Buna N and Buna S 6 Arrange the following polymers to creasing order of their intermolecular fo Nylon 6 6 Buna S Polythene 0 Nylon 6 Neoprene Polyvinyl chloride

5 A short section of the polymer polypropylene is shown below a Draw and name the monomer that is used to make this polymer 2 marks b What type of polymer is polypropylene It is created through what type of reactions 2 marks CHY CH H CH3

Indicate the predominant intermolecular attractions occurring in the molecule shown below CH3F fluoromethane covalent bonds ion dipole O dispersion forces dipole dipole forces hydrogen bonds

Pressure A C What phases are present at point E O Liquid only O Vapor only O Liquid and Vapor O Solid and Liquid O Solid and Vapor B F H Temperature I

Which substance will have the highest vapor pressure a CF4 Ob CBr4 c CCl4

What is the hybridization on the N atom in NH3

Give the number of valence electrons for Oxygen

SO3 aq MnO aq SO aq Mn aq EN HEND PE EINE C ENWARTE THERINE

If the concentration of so ions when equal volumes of 0 1 M MgSO4 and 0 1 M KNO3 are mixed together is Assume all electrolytes are completely ionizable in the solution x Then the value of 100 x will be Answer 00 01 02 03 04 05 06 07 08 09 00 01 02 03 04 05 06 07

Kevlar is a strong synthetic fiber used in bullet proof vests and body armor Kevlar is made by the condensation reaction betwe 1 4 phenylene diamine and terephthaloyl chloride Modify the monomers to create one repeat unit of the polymer O What other small molecule is produced in this reaction Give the formula of the small molecule produced

Explain why the mass of the solute is conserved when a solution is diluted

Question 1 Which phase change is exothermic solid to liquid liquid to gas liquid to solid solid to gas

Question 4 Which segment of the graph represents a time when both the solid and liquid phases are present Temperature C AB DE OEF BC B C Time minutes E F

Observe this picture and choose the correct statement A B O When combined B might be found in oils O When combined B might be found in cholesterol O Uncombined B might be found in fats

Which one of the following is the repeating unit of the polymer formed in the polymerization of para hydroxybenzoic acid fot 604 to 0 Structure B O Structure D Structure C Structure A B 1 008 D S

Identify the following structures F F T I C C T F F H C H n n H3C CH H LAX n HH T B

FICIF H C H FICIF n J 0 H3C CH 11 H H H n H H

An example of polystyrene polymer could be found in a Insulation b Yarns c Adhesives An example of polyacrylonitrile polymer could be found in a Insulation b Fabric An example of poly vinyl acetate could be found in a Packing materials b Wigs c Paints c Computer disks An example of poly methyl methacrylate could be found in a Furniture b Orlon c Textile coatings The number after a compound trade name is usually an indication of a Stock number b Successful attempt d Meaningless d Plexiglass d Lucite d Bowling balls d Plexiglass d None of these

An example of a linear polymer would be a Kevlar b Rubber An example of a branched polymer would be a PVC b Kevlar An example of a cross linked polymer would a LDPE b PVC An example of a network polymer would be a Rubber b LDPE An example of polyethylene polymer could be found in a Carpet b Garden Hose c LDPE An example of polypropylene polymer could be found in a Plastic bags b Plastic wrap c Rubber c Kevlar c PVC c Toys An example of polytetrafluoroethylene polymer could be found in a Plastic bottles b Plumbing parts c Cooking utensils c Carpeting An example of polyvinylchloride polymer could be found in a Carpeting b Plastic Toys c Sewer pipe d PVC d LDPE d Rubber d Kevlar d Cooking utensil d Bottles d Teflon d Cooking utensil

For a particular process AG AH at a given temperature and pressure Therefore O AS is negative if AH is positive and positive if AH is negative ASAG T AS is zero 0 GA

e References to access important values if needed for this question When the following molecular equation is balanced using the smallest possible integer coefficients the values of these coefficients are iron s oxygen g iron III oxide s

Of the following state functions only can be obtained without calculating a change first none of these E U all of these H as

Label the components of the initiation step of protein synthesis Drag the appropriate labels to their respective targets View Available Hint s start codon peptide bond tRNA ribosomal subunit small amino acid mRNA strand 06 00 Reset 3 He

Identify the following molecule H H OH H H H a OH OH cis fat Ob trans fat O c fatty acid O d glycerol 4

Identify the following molecule 20 CH3 12 CH 21 18 17 H 2 3 REECHNO 1 FALCON 4 10 15 11 CH 19 6 H 13 14 8 7 H I 15 O a omega fatty acid O b steroids O c trans fat O d fatty acid 16

A chemist prepares a solution of silver 1 perchlorate AgCIO by measuring out 1 3 x 10 mol of silver I perchlorate into a 300 ml volumetric flask and filling the flask to the mark with water Calculate the concentration in mmol L of the chemist s silver 1 perchlorate solution Round your answer to 2 significant digits nol

What is the shape of trigonal planar from the side as explained in video a Triangle b Point c Line or Plane d Pyramid

anol is the alcohol found in brandy that is sometimes burned over cherries to make the des lee e a balanced equation for the complete oxidation reaction that occurs when ethanol C H5OH bu the smallest possible integer coefficients 0 C H5OH error has been detected in your answer Check for typos calculations etc before submitting your answer Botry Entire Group 9 more group attempts remaining CO H O

Which of the following would be an appropriate choice to buffer solution pH at pH 9 0 Select one a b 0 1 M HIO K 2 3 x 10 11 and 0 1 M KIO 0 1 M HBrO Ka 2 0 x 10 9 and 0 1 M KBrO 0 1 M HF K 6 8 x 10 4 and 0 1 M KF c d 0 1 M HCIO K 3 0 x 10 8 and 0 1 M KCIO e 0 1 M HC3H5O2 Ka 1 3 x 10 5 and 0 1 M KC3H502

Which statement or statements below is correct or true OA Enantiomers rotate the plane of polarized light in opposite directions but in the same number of degrees B Plane polarized light is composed of waves that vibrate in only one plane OC Asymmetric carbon atoms are examples of chirality centers which are examples of stereocenters D Mirror images that can be superposed are achiral not chiral OE All of above statements

Compare the properties of diastereomers A Same physical properties B Can not determine OC Different physical properties D Same chemical properties None of above

What is the name of the linear hydrocarbon with the molecular formula C 12H 26 a heptane Ob decane O c dodecane Od undecane

Example Balance the following redox equation in a basic solution Zn NO3 Zn NO

C6H12O6 not one of the substances in the video is made up of all metalloids and therefore is a n high or low melting point metals ionic or covalent substance with a

EGVERSENT A 2 5 x 10 M solution of HNO3 has a pH of C 4 3 a 2 5 Pitalark HEALIN Rainer b 3 6 d 10 4

A mixture of equal amounts of two enantiomers OA Racemic mixture OB Optically inactive C Optically active O D Both A and B E Both A and C

a Consider the molecules below in terms of a condensation polymerization i Predict the products 2 and show the mechanism 3 steps for the reaction between the two molecules below ii Clearly label the Electrophile and Nucleophile in each step where appropriate iii Name each elementary step HO OH O 0

Identify the constitutional isomer with the molecular formula C7H14 H3C CH3 O a Only II O b Only I O c I II and III O d Only I and II CH3 H3C CH3 CH3 CH3 CH3

Under identical environmental conditions which of the following substances is the most soluble in water Select one a Ne b Ar c Kr d Xe e all of these are equally soluble in water

The density of ammonia gas in a 4 76 L container at 907 torr and 52 7 C is g L Record your answer with 3 significant figures

What is the geometry around the circled carbon atom below OH CI HN Select one O planar 2D O linear 1D tetrahedral 3D N

A Is CH O polar or nonpolar B Is NF3 polar or nonpolar C Is NH Cl polar or nonpolar ences to access in

What is the hybridization of the central atom in CO3 O sp d sp sp sp d sp

A Is XeO4 polar or nonpolar B Is SCI polar or nonpolar C Is SO polar or nonpolar V

A local AM radio station broadcasts at a frequency of 780 KHz Calculate the energy of the frequency at which it is broadcasting Energy kJ photon 1 KHz 10 sec Submit Answer Try Another Version om

Rank F Cl and Br in order of increasing first ionization energy O Cl F Br O Br Cl F OF Cl Br O Cl Br F Use the References to access important values if n FC

What class of organic product is produced when hex 1 yne is treated with a mixture of HgSO4 H A Ether B Carboxylic acid C Aldehyde

2 Which of the following sugars and amino acids would not be expected to occur in eukaryotes Briefly explain your answer 2 pts H OH H H HO HO H H OH CH OH 1 CO H HCNH CH CH N Co H H N CH CH OH 3 HO HO CH OH C 0 H OH H CH OH

We uncover unexpected metabolic features that extend our understanding of biology and challenge established boundaries between the three of life Source Natu

Which of the following types of hydrocarbons is are saturated OA Alkene B Alkane C Alkyne D Aromatic E All of above