Q: Use the figure of band structures to explain why the conductivity of pure metals decreases when…
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Q: Explain Kohlrausch’s law of independent migration of ions. Mention two applications of this law.
A: Kohlrausch was the First to point out that when Λm for a uni-univalent strong electrolyte is plotted…
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Q: If Na+ ions were to substitute for magnesium ions in MgO, in order to preserve electroneutrality,…
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Q: With the help of the XRD pattern of the NaCl material given in the figure, the unit cell parameters…
A: XRD is X-ray diffraction analysis. By using this analysis one can get an overview of crystal…
Q: Calcium carbonate crystals in the form of aragonite have orthorhombic unit cells of dimensions a =…
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Q: Ultraviolet light with a wavelength longer than about 284.6 nm has little germicidal value. What is…
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Q: The number of vacancies in some hypothetical metal increases by a factor of 5 when the temperature…
A: The presence of vacancy in a crystal is a kind of point defect. The number of vacancies in a crystal…
Q: How does the doping increase the conductivity of semiconductors?
A: Conductivity of semiconductors:When a certain amount of suitable impurity or doping is added, the…
Q: Potassium nitrate crystals have orthorhombic unit cells of dimensions a = 542 pm, b = 917 pm, and c…
A: From the question, we obtain that- Potassium nitrate crystals have orthorhombic unit cells a = 542…
Q: A solid is thought to have an orthorhombic structure. Calculate the positions D and 2θ for the plane…
A: Interpretation- To calculate the position D and 2θ for the plane 111 expected in the diffraction…
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A: Hi, since there are multiple subparts posted we will provide you with answers for the first-three…
Q: larger crystals can be obtained if the
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Q: What is semi-conductor?
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Q: When a metal is heated its density decreases. There are two sources that give rise to this…
A: The answer is attached below-:
Q: ketch the (1 1 1) and (1 11) planes in a simple cubic lattice. Show that (1 1 1) and (111) are a set…
A: Miller indices are the atomic representation in crystal lattice.
Q: Is it possible for for non-metals to have unit cell with face-centered cubic crystal structure?
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A: Doping increases the conductivity as follows.
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Q: Determine the indices of the zone axis of planes (111) and (123)
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Q: Determine the Miller indices for the planes shown in the following unit cell:
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Q: (c) (c) Determine the axis intersects of a surface with Miller Index (i) (220) (ii) (312) (d) Sketch…
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Q: QI. Calculate the linear density of directions [011] for BCC, and FCC crystal structures?
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Q: Determine the Miller indices for the planes shown in the given unit cell.
A: Determine the Miller indices for the planes shown in the given unit cell.
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Q: Q2. Calculate the planer density of planes (011) for BCC, and FCC crystal structures?
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Q: State the number of atoms on a plane having the miller indices of 110 in a BCC unit cell.
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Q: Explain how doping can increase the conductivity of a semiconductor.
A: Conductivity is due to the mobility of electrons; therefore, conductivity can be increased by…
Q: Explain face centered cubic unit cell in the simplest way possible and create an overview about it…
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Q: Silver forms a face-centered cubic lattice, and a silver atom is 288 pm in diameter. Calcula
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Q: 14. Which of the following reflections would be missing in a bcc lattice: (100), (110), (111),…
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Q: How do the appearances of metals, semiconductors and insulators differ? Why?
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Q: What kind/type of force does Schottky defects induces on its neighboring atoms? Explain.
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Under what conditions do zwitterions exist?
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- Consider Figure 21.21. If the lower rightmost corner of the unit cell were selected arbitrarily as the origin, what would be the Miller indices of the indicated plane? Compare your answer to the solution of Example 21.7.Calcium carbonate crystals in the form of aragonite have orthorhombic unit cells of dimensions a = 574.1 pm, b = 796.8 pm, and c = 495.9 pm. Calculate the values of θ for the (100), (010), and (111) reflections using radiation of wavelength 83.42 pm.Calculate the number of Frenkel defects per cubic meter in Al2O3 if the energy required to create a Frenkel defect is 1.75 eV at 410 oC . The density of Al2O3 is 3.27 g/cm3.
- Potassium nitrate crystals have orthorhombic unit cells of dimensions a = 542 pm, b = 917 pm, and c = 645 pm. Calculate the values of θ for the (100), (010), and (111) reflections using radiation of wavelength 154 pm.The number of vacancies in some hypothetical metal increases by a factor of 5 when the temperature is increased from 1060 K to 1160 K. Calculate the energy (in kJ/mol) for vacancy formation assuming that the density of the metal remains the same over this temperature range.The maximum wavelength of light that a certain silicon photocell can detect is 1.11 μm. (a) What is the energy gap (in electron volts) between the valence and conduction bands for this photocell? (b) Explain why pure silicon is opaque.
- What is the trend for atom size from left to right across aperiod?When a metal is heated its density decreases. There are two sources that give rise tothis diminishment of : (1) the thermal expansion of the solid, and (2) the formation of vacancies. Consider a specimen of gold at room temperature that has a density of 19.320 g/cm3.(a) Determine its density upon heating to (800°C) when only thermal expansion is considered.(b) Repeat the calculation when the introduction of vacancies is taken into account. Assume that the energy of vacancy formation is 0.98 eV/atom, and that the volumecoefficient of thermal expansion, is equal to 3 αlhow do you calculate the planar density (100) and (110) of a simple cubic structure