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please show all your work Assign a Lewis structure, compute formal charges, and

ID: 813478 • Letter: P

Question

please show all your work

Assign a Lewis structure, compute formal charges, and indicate the geometry for each of the following molecules/ions BH4- ; BeF2; NH4+; H2S ; BH3 ; CF4 ; SiF4 ; CCl3- Write resonance structures for the azide ion N3-. Explain how these resonance structures account for the fact that both bonds of the azide ion must have the same bond length. The actual bond in NO2 is 134.3 and in NO2- it is 115.4, although the ideal bond angle is 120 in both. Explain. Chloral, Cl3CCHO, reacts with water to form the sedative and hypnotic agent chloral hydrate, Cl3CCH(OH)2. Draw Lewis structures for these substances and describe the change in molecular geometry/shape, if any, which occurs around each of the carbon atoms during the reaction. A gaseous compound has a composition by mass of 24.8% carbon, 2,08% Hydrogen, and 73.1% chlorine. At standard conditions this gas has a density of 4.3 g/L (it is acceptable to do an internet search). Draw a Lewis structure that fits these facts. Oxalic Acid (H2C2O4) is found in toxic concentrations in rhubarb leaves. The acid forms two ions, HC2O4- and C2O4 2- by loss of H+. Draw Lewis structures for the three species and indicate the geometry of every central atom. Compute all the formal charges for each atom.

Explanation / Answer

answer to question 3

NO2 is having odd no of valence electron, hence it behaves as an odd molecule with bond angle stretched from normal 120 degree to134 degree

where as in case of NO2- it contains even electrons and due to VSEPR theory bond pair & lonepair repulsion bond angle decreases.