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Consider ethanal (acetylaldehyde) which can exist as a pair of tautomers in equilibrium. Calculate the SCF energies of keto and enol forms, convert to Kcal/mole and calculate their relative energy values.
Do the same for 2,2 difluoro ethanal and compare your results. How does the presence of the fluorine atoms effect the keto/enol ratio?
Explain your results thoroughly.
Next do the same for 2 nitro ethanal NO2-CH2-CHO.
Carbon and silicon belong to the same group and are known to have similar properties
What mass of solid sodium fluoride (molar mass = 41.99 g/mol) should be added to 1.0 L of 0.23M hydrofluoric acid to make a buffer with a pH of 2.94? (Ka of HF = 1.36 x 10-3)
If a tube contains 4.0 oz of sunscreen, how many kilograms of benzyle salicylate are needed to manufacture 325 tubes of sunscreen?
In an experiment, equal volumes of 0.00200M FeCl3 and 0.00200M NaSCN were mixed together and reacted according to the equation:
what is the longest wavelength of radiation that possesses the necessary energy to break a nitrogen bond.
Calculate the molarity of hydrogen peroxide if 28.75 mL of hydrogen peroxide produced 695 mL of oxygen gas at 0.950 atm and 315 K?
what would be the product if you reacted 1,3-dimethoxubenzene with tert-butyl alcohol?
The air is cooled as the water evaporates. How much water must be evaporated to cool the air in a room of dimensions 4.0 m x 5.0 m x 3.0 m by 20. C? Assume that the enthalpy of vaporization of water is the same as it is at 25 c.
The solubility of silver chromate, which has a Ksp equal to 9.0e-12 at 25 degrees celsius, is determined in water and in two different solutions. Predict the relative solubility of silver chromate in the three solutions
what percentage of HSO4- is dissociated in 2M solution? Why does molarity approximate molality at low concentrations?
Treatment of the bicyclic chloride A with lithium in tetrahydrofuran (THF) gave the monocyclic product B, C9H9Li. In deuterated THF, B exhibited a single proton NMR signal at 6.72 ppm
the weak base methylamine is titrated with 0.10 M HNO3. Calculate the pH after 20.0 mL and 60.0 mL acid addition (HNO3).
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