(a) What are the C¬C¬C bond angles in diamond?(b) What are they in graphite (in one sheet)? (c) Whatatomic orbitals are involved in the stacking of graphitesheets with each other?

Q: 2. How many octahedral and tetrahedral holes are there in CCP and HCP unit cells?

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Q: 1. a) What is the definition of atom, molecule and polymer? b) Show the electron configuration of…

A: Definition  Atom:: An atom is a particle of matter that uniquely defines a chemical element. An atom…

Q: Which of the following group 14 (Ciroup IV) elernent/compounds have giant govalent lattices? I SiO:…

A: The electropositivity of the  elements down the group increases and the tendency to form ionic bond…

Q: What is the trend in the size of the bandgap as you move down the column of the group 4A elements?

A: Band-In molecular orbitals of an atom the set of closely discrete energy levels is called as band.…

Q: sketch 2D network structure of amorphous B2O3

A: Borate glass: B2O3: the glass former consisting of corner -sharing BO3 triangles connected by bridge…

Q: Briefly describe the significance of anion gap?

A: We have to tell the significance of anion gap.

Q: An orthorhombic unit cell has dimensions a = 769 pm, b = 891 pm, and c = 690 pm. Calculate the…

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Q: 1b What is the Miller index of the plane intersecting the crystal axes (2a, 1b, -3c)?

A: Given: Miller index of the plane = ? Plane intersect the crystal axis = ( 2a, 1b, -3c )

Q: The unit cells of SbCl3 are orthorhombic with dimensions a = 812 pm, b = 947 pm, and c = 637 pm.…

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Q: Sketch the [1̅010] directions in a hexagonal unit cell

A: Procedure for drawing planes for [1̅010]. 1. Converting four index miller indices of [1̅010]. into…

Q: Distinguish  between the bond thos exist  In CsCl and SiC Crystals.

A: Chemical Bond: Chemical bonds are type of forces which hold two or more than two atoms to form a…

Q: Sketch the shape and orientation of the following types oforbitals: (a) s, (b) Pz?

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Q: Explain, using intermolecular forces, why at room temperature, petrol (mainly octane, C8H18) is a…

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Q: Questión 4 Tungsten is BCC and has a lattice constant a of 0.31648 nm. Calculate the following…

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Q: How do you find the coordination number for [Al(OH)4(H2O)2]-?

A: Coordination number is the number of atoms, ions, or molecules that a central atom or ion holds as…

Q: Draw a triclinic unit cell and mark on it the (100), (010), (001), (011), (101), and (110) planes.

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Q: . Derive the Atomic Packing Factor for HCP crystal Structure (c/a =1.63)

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Q: In how many allotropic forms does arsenic exists?

A: Allotropes of an element are forms of the same element with different physical and chemical…

Q: Express the relationship between atomic radius (r) and the edge length (a) in the bcc unit cell.

A: Note that for a BCC unit cell, there will be one atom divided equally at all the 8 corners of the…

Q: what is meant by the term polarizability?

A: Polarization means separation of charges. So, as the name suggests, the polarizability is the…

Q: 3- Calculate the radius of an iridium (IR) atom, given that IR has an FCC crystal structure, a…

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Q: Q10a. Explain order parameter and its importance in respect to liquid crystal materials? What are…

A: Answer - According to the question - Liquid crystal is a state of matter that has properties between…

Q: Describe the caesium-chloride and rock-salt structures. How does the radius-ratio rule help in the…

A: The below is the structure of cesium chloride.

Q: In terms of band theory, what is the difference(i) between a conductor and a semiconductor?(ii)…

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Q: Estimate at what temperature silicon tends to be as electrically conductive as diamond at room…

A: The solution is provided in the image below.

Q: Q2. Give a list ONLY for the following items: 1. The main bases on which crystallographic systems…

A: We have asked to give only list for the item given and the answer to this question is given in…

Q: What is the arrangement of the Ca2+ ions (white spheres)? A BCC в) FCC HCP D sc

A: Arrangement of the Ca2+ ions (white sphere) = ?

Q: Define allotropy. Describe different allotropes of Carbon including  a) diamond, b) graphite and…

A: Allotropes are forms of the same element which have either exist in the same or different physical…

Q: Which of the following is most suitable for crosslinking Si-O-Si chains in silicone polymers?…

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Q: Calculate the density (g/cm³) of Rb if it crystallizes in body center cubic (bcc) and has a radius…

A: Given the radius of Rb is  272 pm. The density of Rb has to be calculated.

Q: Hydrazine (H2NNH2), hydrogen peroxide (HOOH), andwater (H2O) all have exceptionally high surface…

A: (a) Lewis structures of Hydrazine (H2NNH2), hydrogen peroxide (HOOH), andwater (H2O) are given…

Q: how does the excess citrate ion (C6H5O73‐) affect nanoparticle synthesis?

A: Given information,Synthesis of nanoparticles using citrate ion.

Q: In a fcc arrangement of A and B atoms A are present at the corners of theunit cell and B are present…

A: The face-centered unit cell has atoms on the corners and faces. The A atoms are present at the…

Q: Draw the 2D network structure of crystalline AND amorphous B2O3

A: Given that, the 2D network structure of crystalline AND amorphous B2O3

Q: LiBr has a density of 3.464 g/cm^3 and the NaCl crystal structure. Calculate the interionic distance

A: LiBr has a molecular weight of 86.845, and the unit cell contains four cations and four anions. Z =…

Q: the theoretical density in g/cm^3

A: The required solution is as follows:

Q: 5. Describe the crystal structure of BaFei2O19. What is the relation between permeability with…

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Q: What is the difference between tetrahedral and octahedral voids?

A: The difference between tetrahedral and octahedral voids can be shown in below

Q: Carbon and silicon belong to the same group of the periodic table. Describe and compare three…

A: Carbon and Silicon both elements belong to the same group that is group 14(4A). They contain same…

Q: At room temperature, monoclinic sulfur has the unit-cell dimensions a = 11.04 Å, b = 10.98 Å, c =…

A: Given data: The unit cell is the monoclinic. Dimensions, a = 11.04 Ao, b = 10.92 Ao, c = 10.92 Ao  β…