If Ag nanocubes, tetrahedra, octahedra, and nanospheres are suspended in water with no capping agent on their surfaces. Assuming that these individual nanocrystals have the same mass, which one of them is most susceptible to shape transformation in water? Justify your answer.

Q: Why is the average molar mass of a polymer sample dif-ferent from the molar mass of an individual…

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

A: The degree of polymerization (DP or Xn) is defined as the number of monomer units in a polymer or…

Q: The electronic structure of a doped semiconductor is shown here.  1.)Is this an example of an…

A: Semiconductors can be defined as the materials whose conductivity lie between metals and insulators.

Q: High-density polyethylene (HDPE) is opaque while low-density polyethylene (LDPE) is transparent.…

A: Polyethene is widely used tharmoplastic now a days.Based on molecular structure it can be…

Q: A liquid rises to a height of 1.50 cm in a capillary tube. What is the radius of the tube if the…

A: The liquid rises and falls in a capillary tube due to the forces of adhesion and cohesion. The…

Q: Why is it not advisable to freeze a sealed glass bottle that is completely filled with water? Use…

A: On decreasing temperature volume is going to be decreased. The same thing happens in the freezer…

Q: At high temperatures, glass has a tendency to change its shape into a sphere. Assume that the…

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Q: We have spent some time discussing reactions that occur in aqueous media and devoted some attention…

A: The power required to drive the hydrological cycle is primarily driven by the energy from the sun.…

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: Calculate the density of gold, which has a face-centered cubic unit cell (see figure) with an edge…

A: Given :-  Gold metal formed FCC unit cell., Number of atoms per unit cell (FCC) = 4 Molar mass of…

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: The ionic radii of the Mg21 and 022 ions are 0.86 Å and 1.26 Å, respectively. Given that the…

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Q: How does the random coil shape relate to the radius of gyration of a polymer chain?

A: Polymers are formed by polymerization of monomer units, which consist of a long repeating chain of…

Q: Calculate the packing fractions of (i) a primitive cubic unit cell, (ii) a bcc unit cell, (iii) an…

A: Packing fractions give us an idea about how well the atoms are packed in the unit cell. The packing…

Q: The unit cell length for a Face Centered Cubic unit cell is 4r/Sqrt(3). Why? Derive this equation.

A: Face Centered Cubic

Q: If the density of europium is 5.25 g/cm3 at 20 degrees celsius, what is the mass (in grams)of one…

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Q: 1. T F The change in resistance to flow with temperature that many liquids exhibit is a chemical…

A: One of the important properties of liquids is the viscosity which is defined as the resistance of a…

Q: Explain how the intensive properties of a material are reflected in the unit cell. Are all the…

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Q: How many (a) nearest neighbours, (b) next-nearest neighbours are there in a body-centred cubic…

A: SOLUTION: Step 1: (a) For BCC, each lattice points have 8 nearest neighbors (in the centers of the…

Q: a. Compute the densities of totally crystalline and totally amorphous polyethylene terephthalate. b.…

A: Step : 1             The answer for the following questions.

Q: The unit cell of a compound containing strontium, iron, and oxygen is shown here. Compute the…

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Q: Given that an atom of a semiconductor has a diameter of 3.31 ÅÅ , what is the maximum number of…

A: Given information, Diameter of an atom = 3.31A° = 3.31*10-10 m Radius of atom = diameter/2 =…

Q: Describe the glass transition temperature, Ty by comparing the process of heating a small molecule…

A: Glass Transition Temperature (Tg) : When an amorphous polymer is heated, the temperature at which…

Q: how do you calculate the planar density (100) and (110) of a simple cubic structure

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Q: Given that the density of KBr is 2.75 g/cm3 and that the length of an edge of the unit cell is 659…

A: Interpretation: The density of KBr is 2.75 g/cm3 and that the length of an edge of the unit cell is…

Q: What is the actual meaning of Biocompatible and biodegrable for the scaffolds for biomedical…

A: A question based on introduction to polymer that is to be accomplished.

Q: Gold has a radius 144 pm. Determine the length of the edge of a face centered cube cell. SHOW ALL…

A: Given,  Radius = 144 pm

Q: A crystalline form of molybdenum has a face centered cubic structure. If the radius of a molybdenum…

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Q: Consider the thermodynamic data below:   Compound ΔHf(kJ/mol) C3H8(g) −103.85 O2(g) 0 CO2(g)…

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Q: The orthorhombic unit cell of NiSO4 has the dimensions a = 634 pm, b = 784 pm, and c = 516 pm, and…

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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: In which direction along the periodic table does thermal conductivity generally increase?

A: Thermal conductivity does not show regular increase or decrease in periodic table.In every group and…

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: 4- A naturally occuring gold crystallizes in face centred cubic structure and has a density of 19.3…

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Q: The heat of fusion of a sample of (polyethylene oxide) (PEO) was determined by DSC and turned out to…

A: Given that, the heat of fusion of a sample of (polyethylene oxide) (PEO) was determined by DSC and…

Q: Draw the isotactic, syndiotactic, and atactic form of polypropylene.

A: characterstics of these three polymers are as follows : Isotactic polypropylene is strong and hard…

Q: The monomer of poly(vinyl chloride) has the formula C₂H₃Cl. If there are 1565 repeat units in a…

A: To calculate the molecular mass (in amu) of the chain that contains 1565 units of C₂H₃Cl.

Q: Given that the density of KBr(s)KBr(s) is 2.75 g/cm32.75 g/cm3 and that the length of an edge of its…

A: For a crystal lattice, density is given by the formula:ρ= Z ×MNA ×a3  where, ρ= Density           Z=…

Q: What is the probability of a lattice site to be empty for adamantine at 250 degrees C? Delta H for…

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Q: (a) Consider the polymerization of isoprene (see below for the formula): Draw the chemical structure…

A: The polymerisation of isoprene involves different radical formations which gives a different type of…

Q: Determine the packing factor for the FCC cell. In a FCC cell, there are four lattice points per…

A: There are different types of packing of atoms within a unit cell. It can be: simple cubic FCC BCC…

Q: Using your knowledge about the properties of individual water molecules and your observations of the…

A: The molecular formula of a water molecule is H2O and a typical bent-shaped water molecule looks like…