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The pentapeptide leucylglycylthreonyltyrosylalanine is first incubated with FDNB. When the resulting compound is heated to 110 deg C for 24 hrs in the presence of 6M HCl, the solution will contain:
a. 1 alpha amino acid labled by FDNB and an unlabled tetrapeptide
b. 5 alpha amino acids with only leucine labeled by FDNB
c. all 5 alpha amino acids, each labeled by FDNB
d. all 5 alpha amino acids, but only alanine will be labeled by FDNB
draw the contributing resonance structures for each of the following species. label the structures as major or minor contributors.
Calculate the pH at the equivalence point in titrating 0.100 M solutions of each of the following with 0.034 M NaOH. (c) sodium hydrogen chromate (NaHCrO4)?
what is the mole fraction of magnesium chloride in a solution prepared by adding 15 grams of magnesium chloride
Classify each description of a complex by the number of unpaired electrons in the d4 metal ion.
A sample of vanadium haveing 5.67 grams of mass upon heating combined with oxegen of 4.45gramsto make vanadium oxide. Determine the emperical formula for this compound?
Hydrazine, ammonia, and hydrogen azide all contain only nitrogen and hydrogen. The mass of hydrogen that combines with 1.00g of nitrogen for each compound is .144, .216, and .240, respectively.
What would be the result of a column chromatographic separation if the column chromatography was to be performed in the following eluents:
This point we have magnesium ions in solution and fluoride ions in solution. Remember the Ksp of MgF2 is equal to 3.7 x 10^-8 at room temperature
Draw the correct structure for (3S,4S)-3,4-dimethylhexane. Show stereochemistry clearly. To ensure proper grading, explicitly draw all four groups, including wedge/dash bonds
Calculate the equivalent number of moles of potassium permanganate? 3) calculate the clarity of the potassium permanganate solution?
which is an aqueous solution of acetic acid, HC2H3O2 , requires 24.5 mL of 0.450 M NaOH to reach the endpoint in a titration. What is the molarity of the acetic acid solution
What mass of NaHCO3 (M = 84.0) is required to completely neutralize 25 mL of 0.125 M H2SO4? answer is 0.525 g please expline how
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