QI: Explain the effect of dispersed phase in determination the properties of composite materials? Q2: Give the electron configurations for the following ions? and Al (Z-13) Fe" (Z-26)
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- The photoelectron spectrum of HBr has two main groups of peaks. The first has ionization energy 11.88 eV. The next peak has ionization energy 15.2 eV, and it is followed by a long progression of peaks with higher ionization energies. Identify the molecular orbitals corresponding to these two groups of peaks.The B2 molecule is paramagnetic; show how this indicates that the energy ordering of the orbitals in this molecule is given by Figure 6.18a rather than 6.18b.(a) What does the term diamagnetism mean? (b) How doesa diamagnetic substance respond to a magnetic field?(c) Which of the following ions would you expect to bediamagnetic: N22 -, O22 -, Be22 + , C2-?
- Cu+ is paramagnetic. True or false?Solid CrF contains a Cr(III) ion surrounded by six F-ions in an octahedral geometry, all at distances of 190 pm. However, MnF3 is in a distorted geometry, with Mn–F distances of 179, 191, and 209 pm (two of each). Explain.how will the density of the dν/dE levels of the energy spectrum of free electrons change and by how many times with an increase in the number of N atoms forming a crystal by n times
- Calculate the number of vacancies per cubic meter in gold (Au) at 900C. The energy for vacancy formation is 0.98 eV/atom. Furthermore, the density and atomic weight for Au are 18.63 g/cm3 (at 900C) and 196.9 g/mol, respectively.a) what is meant by the term polarizability? (b) Which of the following atoms would you expect to be most polarizable: O, S, Se, or Te? Explain.Suppose a chloride ion and a sodium ion are separated by a center–centerdistance of 5 Å. Is the interaction energy (the energy required to pull theminfinitely far apart) predicted to be larger if the medium between them iswater, or if it is n-pentane? (as shown)If Ca2+, Na+, and F- each have ionic radii ~1.16. Which ionic bond is stronger: Ca-F or Na-F?If Ca2+ is often bound on the surface of a protein by carboxylic acid functional groups. If the pKa of a particular -COOH group is 4.2, wouldyou predict Ca2+ to be most tightly bound at pH 8, pH 4.2, or pH 3? Explain your answer.
- Chemistry Why are the observed configurations of, for example, trigonal bipyramidal structures sometimes different for different measuring techniques?10. Which of the following does have the lowest polarizability? Z of I = 53, F = 9, Br = 35, I = 53a.Cl-b.I-c.F-d.Br-How would you explain the experimental observations that the SeF6 unit in Cs2[SeF6] is C2v and looks like six of the seven vertices of a capped trigonal prism are occupied by F, but the SeCl6 unit in Cs2[SeCl6] has Ohsymmetry ?