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The amino acids His 31 and Asp 70 are separated by ~0.35 nm in T4lysozyme. Calculate the Coloumbic potential between the two charged side chains (make the assumption that these are point charges in adielectric medium of 40k0. Estimate the pKa of the His residue in this ion pair.
Given that aprotic solvents are not practical for unimolecular processes (little if any reaction occurs via a unimolecular pathway) draw the skeletal structure of the major organic substitution product when (2S,6R)-2,6-dibromo-6-methyloctane is tr..
write the formula of the reactants and products-including the symbols for the state- s l g aq- then balance the
Your starting mixture contains both KCl and KClO3. Suppose that your starting mixture weighed 2.040 grams total, and suppose that you dertermined during your reaction that you produced 0.0072 mols of O2
What is the molarity of a solution in which 4.00 moles of potassium chloride is dissolved in 3.00l of solution
explain how to correct for the partial pressure of water vapor when calculating the partial pressure of a dry gas that is collected over water.
What are the concentrations of HOAC and OAC- in a 0.2M acetate buffer pH 5.0? The Ka for acetic acid is 1.70 X 10-5 (pKa = 4.77).
C19 H17 Cl F N3 O5 S (all one compound, spaced them so it's easier to see) contains 8 double bonds. How many rings are present. (note treat sulfur as you would oxygen)
what volume of methane, measured at STP, must be burned? (ΔH°combustion for CH4 = -891 kJ/mol)
Consider the titration of 50.0 mL of 0.100 M HC3H5O2 by 0.100 M KOH for the following questions (Ka for HC3H5O2 = 1.3 x 10-5). Calculate all pH values to two decimal places.
How could you synthesize ethyl-(E, E)-5-phenyl-2, 4-pentadieneoate via a Wittig reaction, using benzaldehyde as your carbonyl compound and any other necessary organic or inorganic reagents
The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The pressure of the air in the flask at 257C is 762 mm Hg.
A colored complex of unknown sample solution exhibits 23% transmission through 1-cm long cuvette. A 1/1 dilution solution exhibits a transmission of 47.8%. The transmission from the blank solution is 96%. Calculate the molar absorptivity of the co..
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