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1. Explicate why the gem-dimethyl groups emerge as separate peaks in the proton NMR spectrum of isoborneolwhile they are an unresolved singlet in borneol.
2. The reduction mechanism is frequently shown with a hydride ion (H:-) attacking the carbonyl carbon. Define why might one assign a partial negative charge to the hydrogens in sodium borohydride?
Calculate the vitamin C content of a green pepper (mg vitamin C/g green pepper) if 19 grams of green pepper was extracted into a total extract volume of 54 mLs. Then 5.00 mL of the extract was titrated to the endpoint with 16 mLs of N-bromosuccini..
Which of the following is true of the individual resonance structures which contribute to a resonance hybrid? a) each resonance structure actually exists b) each resonance structure is more stable than is the resonance hybrid c) in going from one ..
Separation of acetone from water by using MIBK - How much MIBK must be used if the final acetone concentration in the water-rich phase is 5 wt%?
It is very desirable that pesticides eventually decompose in the environment to give harmless products. Let us assume the half life for the first order decomposition of a certain pesticide is 10.2 years.
The effective nuclear charge is approximated as the total nuclear charge minus the number of core electrons. Thus, effectively, core electrons decrease the nuclear charge felt by the valence electrons because they are between the nucleus and the v..
what is the solubility of helium in water at 30 ordmc if its partial pressure above the solution is 350 torr? the
How many protons are required to heat 200mL of coffee from 22 degrees Celsius and 64 degrees Celsius
Calculate the final temperature when a 20.4 gram sample of ice at 0oC is placed into a styrofoam cup containing 111 grams of water at 72.7 oC. Assume that there is no loss or gain of heat from the surroundings.
A 98.5-L tank of argon gas at 2940 psi is allowed to vent into an airtight room that is and in which the temperature is 20.0 °C and the air pressure is 756 mmHg. Assuming ideal behavior, what is the volume percent argon in the air in the room afte..
Calculated molarity of HClO: .50/.4541=.174 2) calculated molarity of NaClO: (5.86g/74.45 g/mol)/(.4541L=1.10) 3) Set up ICE chart and calculated H+(x). x=(3E-8)(1.10)/(.174) = 1.90E-7 4) took negative log of 1.90E-7 to get a pH of 6.72.
Calculate the entropy change in the surroundings associated with this reaction occuring at 25 degrees C. Show all your calculations. The change in enthalpy for the reaction is +163.2 kJ. 2N2(g) + O2(g) ---> 2N2O(g)
the following changes in a DNA molecule may have no effect on the protein for which the DNA codes
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