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For questions 1-5 below, determine the point group for each of the following molecules, ions and objects. Draw a clear picture of each molecule, ion and object and clearly show or describe all symmetry elements necessary to determine the point group. Remember, only the connectivity of the atoms determines the symmetry, not the bond order or lone-pair electrons. Be very careful that you have drawn the correct structure when required.
You do not need to find all symmetry elements, just those necessary to identify the point group. Drawing symmetry elements is great, but I would expect quite a few to be described in brief words based on your drawings.
1. a) borazine, B3N3H6
b) a paper clip
2. a) a trash can
b) cyanide ion, CN-
3. a) FeCl63-
b) a Pringles® potato chip
4. a) NiCl2H2 (tetrahedral)
b) NiCl2H2 (square planar)
5. a) a dxy orbital (shading counts!)
b) a pz orbital (shading counts!)
Look at an electron affinity chart. If we go to a planet where large deposits of element astatine (At), element 85, were found, define what would be its natural molecular composition. That is what would you say would be the molecular formula for A..
Provide an explanation on why the methylene unit between the two carbonyl groups is more acidic than each of the methyl groups in acetylacetone. In the reaction conditions, what is the base responsible for the deprotonation of acetylacetone
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It takes 585J of energy to raise the temp of 125.6g mercury from 20.0 degrees C to 53.5 degrees C. Calculate the specific heat capacity and the molar heat capacity of mercury
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A certain molecule fluoresces at a wavelength of 400 nm with a half-life of 1.0 ns. It phosphoresces at 500 nm. If the ratio of the transition probabilities for stimulated emission for the S
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