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Huckel theory: Benzene and Azaborine
Question 1: Set up the Energy matrix for C6H6.
Question 2: Solve for the molecular orbital's and normalization coefficients.
Question 3: Determine the resonance energy.
Question 4: C4BNH6 is isoelectronic to C6H6. If ßaz= ßbz*1.2 for C-N, ßaz= ßbz *0.8 N-B and ßaz= ßbz *0.9 for B-C and ßaz= ßbz for C-C bonds. What are the new molecular orbital's?
Question 5: Is the resonance energy higher or lower than benzene? What can one say about the aromatic character?
a termolecular reaction is carried out involving only two reactants, A and B, where two molecules of A are involved for each molecule of B. When the concentration of A is 0.415 M
When 35.0 g of an unknown nonelectrolyte is dissolved in 220.0 g of benzene, the solution boils at 83.2°C. Calculate the molecular weight of the unknown nonelectrolyte. The Kb for benzene = 2.53°C/m. The boiling point of pure benzene is 80.1°C.
a student reported the following for his unknown mixture 25 nh4cl 30 nacl and 50 sio2. assuming that the calculations
A chemical reaction is run in which 463 Joules of work is done by the system and the internal energy changes by -1027 Joules. Calculate the amount of heat transferred.
Wood and oxygen are two reagents required to keep a campfire burning. identify the limiting and excess reagent: a) The fire dwindles over time. b) A carbon dioxide fire extinguisher puts out the flame.
Sulphur displays a wide range of oxidation numbers. Determine the oxidation number of sulphur in each of the following species.
Carbon dioxide dissolves in water to form carbonic acid. Estimate the thermodynamic equilibrium constanst (K) for this reaction (delta Gf values: H2CO3= - 616.1, H2O= - 237.1, CO2= - 394.4) .
Calculate the molality of the solution and the 95% CL, and write the final result with correct format.
Calculate the pH of the solution after the addition of 30ml of 0.1M NaOH. Draw the structure of the form is His predominating in solution at neutral pH.
What is the bubble point temperature at 2 atm. What is the dew point at 2 atm. What is the temperature if 50mole % is vapor?
how much heat in kj would be required to vaporize 1.00 L of diethyl ether (C4H10O), density is 0.714g/mL at 298 K, if the enthalpy of vaporization at this temperature is 26.0 kj/mol?
calculate the mass of CuS produced and the concentration of H+ ion produced by bubbling H2S into 1.00 L of 0.10 M CuCl2 (aq) solution. the net ionic equation
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