Determine the % enantiomeric excess of a mixture
1.Determine the % enantiomeric excess of a mixture of 0.4 mole (R)-DOPA and 0.6 mole(S)-1-DOPA?
2. Recalling that (S)-DOPA is effective against Parkinson's disease, would giving a patient the mixture in part be helpful or harmful? Briefly explain.
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When 40.5 L of oxygen gas and 35.6 L of ammonia (NH3) gas react, nitric oxide (NO) and the water are produced. After the products return to 0o C and 1.00 atm, determine the numbers of grams of nitric oxide are present?
The current in the circuit is provided by i = t(root t^2 +1) amperes. Determine change (in coulombs) which passes the given point in the circuit after 1 s. (Suppose that q=0 when t=0.)
Write down the reactions showing how the nylon can be synthesized so that it will react with the basic dyes and the acidic dyes.
Find out which element tends to attract the electron density from the other in a covalent bond and enter the four letters corresponding to these choices (e.g. ACEG, BDFH, etc.) (A) O and (B) C; (C) H and (D) O; (E) Hg and (F) C; and (G) Si and (H)
Recalling that (S)-DOPA is effective against Parkinson's disease, would giving a patient the mixture in part be helpful or harmful? Briefly explain.
Previous studies consider that vegetarians might not receive enough zinc in their diets. As the zinc requirement is particularly significant during pregnancy, researchers conducted a study to find out whether vegetarian pregnant women are at great
Determine the concentration of each ion remaining in the solution after the reaction has reached completion. Calculate the mass of solid produced after the reaction has reached completion.
The between groups sum of squares was computed to be 1,170.5, and the WITHIN groups sum of squares was calculated to be 8,470.1. (NOTE: These are not the mean sum of squares)
Discuss how much of an initial sample of carbon-14 remains un-reacted after the 42,000years if the carbon- 14 nucleus decays by beta emission according to a first-order rate law with a half-life of 5730 years.
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