Q: Н Н CH2CH2CH2CH3 CH(CH3)2
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Q: 2. The reaction below produces predominantly ketal W. Draw the structure of W. X= trace H HO HO W
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Q: OH CH,-CH2-c-o-CH2-CH, Н OH CH₂-CH₂-C-OH HT CH3-CH2-C-O-C Ш Predict the product of the following…
A: Product of following reaction can be made by applying appropriate reaction mechanism.
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- Determine the linear and planar densities of the (111) direction of zinc (HC structure).Verify that the lowest value of the radius ratio for (a) sixfold coordination is 0.414, and (b) for eightfold coordination is 0.732.If a Schottky defect concentration of 6.2 x 1010 /cm3 is observed in Al2O3, what is the total vacancy concentration (in 1/cm3) present in this sample of Al2O3? a. 2.3 x 108b. 3.1 x 1010c. 6.2 x 1010d. 1.24 x 1011e. 3.1 x 1011 When compared to that of a covalent material, the short-range atomic structure of amaterial assembled using ionic bonding can be characterized as having a:a) higher coordination numberb) lower atomic packing factorc) higher atomic packing factord) lower coordinationnumbere) a and c only
- What point defects are possible for Al2O3 as an impurity in MgO? How many Al3+ ions must be added to form each of these defects? Explain.(a) Melting points of the halogens Halogen Mr (to 1 do) Tm (°C) Fluorine, F2 e.g., 2 x 19.0 38.0 = -220 Chlorine, Cl₂ -101 Bromine, Br₂ -7.2 lodine, 1₂ 253.8 114 1. Plot a graph Tm (°C) y-axis v Mr of halogen x-axis, using graph paper 2. Describe & explain the trends in terms of the type & size of the intermolecular forces, which exist in the substances in the space below. Trend: Explanation:Assuming that the density of silica gel is 2.65 g cm-3 and that the silica particle are spherical with an average radius of 5 x 10-6 cm, calculate the estimated surface area Sest. Why is there such a large difference between S and Sest?
- Articles on the topic of synthesis and characterization of descriptive compounds with the study of their liquid crystal behaviorX-ray diffractionanalysis(using a Cu anode)of a specimen with a known cubiccrystal structure reveals that the peak generated as a result of reflection from the (110) plane occurs at a 2θ=32°. Determine the unit cell volume of this materia(b) Tungsten has a BCC structure with a lattice constant of 0.317 nm. Evaluate and sketch the planar atomic density for the following crystal planes in BCC: (i) (100) (ii) (110) (iii) (111)
- A quantitative theory of bonding in ionic crystals was developed by Born and Meyer along the following lines: the total force of the system is taken to be: ae² F(r) = N-NA where N is number of positive - negative ion pairs, A and n are constant determined from experiment and at the Madelung constant which depends on the crystal structure of the solid. 1) Derive an expression of the total potential energy and identify the repulsion and the attraction terms. 2) Derive an expression of the equilibrium interatomic distance, re 3) Derive an expression of the bonding energy. 4) if the charge of the ions is double, by what factor both the equilibrium interatomic spacing ro and the bonding energy U(ro) change. Indicate which parameter increase or decrease. Comment on the magnitude of the change of both parameters.What is the Madelung constant for MgO (rock salt) structure? Include only the first 3 terms. Give your answer to 3 significant figures.What are the main advantages and limitations of the Valencia Linkage Theory?