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Both Glu and Lys are charged amino acids yet Glu has a significant Rf compared to Lys; explain? (hint: the solvent/moving phase is 20% acetic acid)
Assume that 50.0 mL of 0.100M HCl was added to 125 mL of 0.100M Sodium Acetate. Is the resulting solution a buffer? Why or why not? Calculate the pH of the resulting solution. The Ka for acetic acid is 1.75 x 10^-5
The amino acid Histidine has a side chain for which the pKa is 6.00. Calculate what fraction of the Histidine side chain will carry a positive charge at pH 7.5
Outline the steps involved in the synthesis of 3-chloro-4-fluoroacetophenone from 4- aminoacetophenone.
Both solutions were initially at 35.00°C and the temperature of the resulting solution was recorded as 37.00°C, determine the ??H°rxn (in units of kJ/mol NaOH) for the neutralization reaction between aqueous NaOH and HCl.
Describe the detailed structure of DNA and explain the manner in which this structure replicates itself in both prokaryotes and eukaryotes
Calculate the heat that must be supplied to 0.104g of Ne(g) at 0.250 atm to raise its temperature from 22.0 degree Celsius to 60.0 degree Celsius at
The E2 reaction of most compounds is known to proceed preferentially by removal of a proton ant-periplanar to the leaving group. based upon this generalalization, predict the geometry of the 1-bromo-1,2-diphenylethylene
Compare the stability of a tertiary carbocation, a secondary carbocation, and a primary carbocation, each with the formula C9H19+. Be sure to delete a hydrogen at the positive center and set the total charge to cation when you setup the calculatio..
The boiling point of water is about 200 degrees Celcius higher than one would predict from the boiling points of hydrogen sulfide and hydrogen selenide. One may explain this apparent anomaly by which of the following?
Calculate the theoretical yield of when 114 g of C2H6 reacts with 206g of Cl2 , assuming that and react only to form and .
Calculate the molar solubilty of BaCO3 in a 0.10 M solution of Na2CO2 (aq). Ksp (BaCO3) = 8.1 x 10^-9
Acetyl chloride reactions, What major organic products would you expect to be formed when acetyl chloride reacts with the following reagents?
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