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Problem- The absorption of light by the pi electron system of a molecule can be modeled as an electron bound in a quantum well.
A- For C4H6, the wavelength required to excite the lowest pi electron transition is 217 nm. Use this fact to estimate the average carbon-carbon bond length.
B- Sketch the wave function for the n=3 state of the quantum well.
C- Calculate the kinetic energy (J) of an electron with a De Broglie wavelength of 2
If possible just a brief explanation how you got the answer?
Find a corresponding criterion for processes at constant V and T. The new thermodynamic variable that is used to express this criterion is called the Helmholtz free energy
A student observed the melting point of 4-methoxychalcone to be 63-70oC. Which of the following is (are) plausible explanation for this observation
The oxygen gas collected over water occupied 53.8mL at a temperature of 25°C and a pressure of 733 torr. Compute the mass percent of NaClO3 in the original sample. If at 25°C the vapor pressure of water is 23.8 torr.
What are the possible values of n and ml the principal and angular momentum quantum numbers for an electron in a 5d orbital
In the spectrum of atomic hydrogen, a violet line is observed at 434nm. Determine the beginning and ending energy levels of the electron during the emission of energy that leads to the spectral line.
Propionic acid and methyl acetate are isomers. Which has the higher boiling point and why. Which one would have the greater rf value on TLC.
Which of the following is false? A. Molecules with strong intermolecular forces have higher surface tension. B. Molecules with strong intermolecular forces have higher viscosities.
How many grams of oxygen gas (O2) will it take to oxidize 1 pound of iron metal? Make sure to show the redox reaction and all work.
The burning of 80.3 g of SiH4 at constant pressure gives off 3790 kJ of heat. Calculate ?H for this reaction.
The percent composition by mass of an organic compound is: 32.01%C, 4.03%H, and 63.96%O. if its molarcular mass is 150 amu, what should be its molecular formula
A solution was prepared by dissolving 0.450 g MgSO4 (FW=120.363g/mol) in 0.500L of water. A 50.0 mL aliquot of this solution consumed 37.60 mL of EDTA solution in a titration. How many milligrams of CaCO3 (FW=100.089g/mol) will react with 1.00 mL ..
sample of a 0.116M potassium sulfate solution is mixed with 38.5mL of a 0.126M lead(II) acetate solution and this precipitation reaction occurs:
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