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A bent molecule a) Methyl azide has the formula CH3N3; the figure on the right shows how the atoms are connected, but not the locations of pi bonds or lone pairs. Draw a Lewis structure for methyl azide, including all bonds, lone pairs, and formal charges. Draw any significant resonance forms. b) What is the hybridization expected for the middle N of the three N atoms in methyl azide? c) The experimentally observed C-Na-Nb bond angle in methyl azide is 117 °, and the bond lengths for Na-Nb and Nb-Nc are 1.24 and 1.13 Å, respectively. Are these measured parameters consistent with your answer in part (a) above? d) If the C-Na-Nb bond angle were forcibly straightened out to 180 °, the methyl azide molecule would become less stable. Why? e) Methyl isocyanate has the formula CH3-N-C-O. The bond angle for the C-N-C bond is 140 °, significantly larger than expected for sp2 hybridization and significantly smaller than expected for sp hybridization. Considering the different resonance structures that contribute to the resonance hybrid in this molecule, explain why this molecule has a larger bond angle than the isoelectronic methyl azide.
A scuba diver with a lung capacity of 5.2 L inhales a lungful of air at a depth of 45 m and a pressure of 5.5 atm. If the diver were to ascend to the surface (where the pressure is 1.0 atm) while holding her breath.
CaCN2 + 3H2O -> CaCO3 + 2NH3 . How much NH3 is produced if 187 g of CaCO3 are produced?
Describe how and why the ferric chloride test can be used to detect whether your reaction has gone to completion.
Consider the following cell: Pt|H2(g, 0.645 atm)|H (aq, ? M)||Ag (aq, 1.00 M)|Ag(s) If the measured cell potential is 1.20 V at 25 °C and the standard reduction potential of the Ag /Ag half-reaction couple is 0.80 V, calculate the hydrogen ion con..
An excited hydrogen atom emits a photon with a frequency of 1.141 x 10^14 Hz to reach the n = 4 state. From what state did the electron
The peak was assigned as a Mn-Cl stretching mode of a contaminate manganese chloride species. Why would you expect this to be an erroneous assignment? Suggest a more likely source of this IR absorption.
Given that vinegar is 5% acetic acid by weight, estimate the percentage of vinegar in the foods. Assume that vinegar is 1.05 g/ml.
In this experiment we reduced methylene blue with ascorbic acid using HCl as a catalyst. Given that the half reaction for the reduction of methylene blue is MB+(ox) +2H +2e ----->MBH2(red) (potential = 100 mV)
Dissolving 3.00 g of an impure sample of CaCO3 in an excess of HCl acid produced .656 L of CO2 (measured at 20 degrees C and 792 mmHg). calculate the percent by mass of calcium carbonate in the sample. State any assumptions.
A particular sample of red brass consisting of 81.0% Cu and 19.0% Zn by mass has a density of 8780 kg/m^3. What is the molality of Zn in the solid solution?
Propose a structure for an amine of formula C4H9N, which liberates a gas when treated with NaNO2 and HCl. The 13C NMR spectrum is as follows
A piece of metal of mass 22 g at 92C is placed in a calorimeter containing 53.7 g of water at 21C. The final temperature of the mixture is 55.3C. What is the specific heat capacity of the metal?
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