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1. a. For the following two peptides, draw the chemical structure of both peptides,indicating where the peptide bonds are.
(i) Pro-Lys-Phe-Asp (ii) His-Tyr-Arg-Trp
b. Draw a titration curve for both of these peptides. Be sure to label the axesproperly, indicate the pKa values, the equivalence points and the bufferingregions.
c. What is the pI value of the peptides. Show how you determine your answer.
Given the following Delta H°298 values in kcal/mol , where "gr" stands for graphite, find Delta f H°298 of Fe(s) and Fe2O3(s) Fe2O3(s) + 3C (gr) --> 2Fe(s) + 3CO(g) 117 FeO(s) + C(gr) --> Fe(s) +CO(g) 37 2CO(g) + O2(g) --> 2CO2(g) -135 C(gr) + O2(..
You are provided a neutral (pH 7.0) aqueous solution of citric acid, caffeine, and triethyl amine. Provide a flow chart for how you would isolate pure caffeine from this mixture using, calcium carbonate, dichloromethane, sodium sulfate(drying), an..
Explain why anhydrous sodium sulfate is used in the extraction experiment and write reactions that shows what happens. Organic layer has p-tert-Butylphenol
You prepared a 0.250 M solution by diluting 8.45(+-0.04)mL of 28.0(+-0.5)mL wt.%NH3 (density=0.899(+-0.003)g/mL up to 500.0(+-0.2)mL. Find the uncertainty in 0.250 M.
A flask contains 0.500molmol of liquid bromine, Br2\rm Br_2. Determine the number of bromine molecules present in the flask.
what is the wavelength in meters of a proton traveling at 2.70X10^8 m/s? (assume the mass of the proton to be 1.673X10^-27 kg)
when formic acid is heated it decomposes to hydrogen and carbon dioxide in a first order decay calculate the partial
Calculate the empirical and molecular formulae of A and B. Deduce the structural formulae of A and B. State the type isoerism exhibited by A and B.
How many mL of 12.1 M HCl solution do you need to dilute to make 100 mL of a soltion with 10 wt%
A sample obtained from that mixture containing 443900 particles weighs 10.0g. Determine the number and percent relative standard deviation of NaCN particels from a sample of the mixture weighing 7.16g.
Calculate the change in temperature for 1.30 g of CaCl2 dissolved in 25.0mL of H2O. Assume that the calorimeter absorbs no heat. (ie C cal=0)
Calcium chloride (CaCl2; very soluble) has been sold as a more effective de-icer than NaCl to spread on icy sidewalks. What would be the ionic strength of a solution
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