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Question- Assume that the pKas of the carboxyl, amino, and side chain protons are the same in the tripeptide( N-terminus aspartic acid, lysine, and valine C-terminus) as they are in the free amino acid species. Starting with the fully protonated tripeptide, determine the magnitude and the sign of the overall charge on tripeptide at
1. pH = 2.0
2. pH = 7.0
3. pH = 12.0
Please demonstrate the entire work. I am thanking you in advance
A gas cylinder contains 370 grams of O2 gas at 30atm and 25C. Explain what mass of O2 gas would excape if first the cylinder were heated to 75C as well as then the valve were held open until the gas pressure was 1atm, the temperature being maintai..
calculate the expected change in temperature for 4.5 g of NH4NO3 dissolved in 100.0 mL of H20. Assume that the calorimeter absorbs no heat. (ie. Ccal=0)
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A solution of 0.1% sodium dodycl sulfate (SDS) binds so strongly to polypetide chains that one detergent molecule is sufficient to saturate two amino acid residues.
Determine if a molecule (or ion) is polar or non-polar, you must determine two factors.
Calculate w (in kJ) when 415 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 464 K:
Problem- Given the enthalpy change and entropy change, which of the following processes will be spontaneous
An unknown mass of each of the given substances 1.Sand (tf=70.4 C),2.Pyrex glass(tf=67.6 C),3.water(tf=55.9 C) ,4.ethanol (tf=45.9 C), initially at 19.0 degrees Celsius, absorbs 1930 Joules of heat. Find out the mass of each substance.
What volume of 0.955 M HCl, in milliliters, is required to titrate 2.152 g of Na2CO3 to the equivalence point?Na2CO3(aq) + 2HCl(aq) ---> H2O(l) + CO2(g) + 2NaCl(aq)
what happens to NH3+H2O=NH4+OH when you add NH4Cl?. what type of change is this, which way is the equilibrium shift, and please explain.
The experiment is called Geometric isomerism where fumeric acid is created from maleic acid. Why isn't norit(decolorizing charcoal) used on the product in this reaction
A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill, you are told that X-281 is a monoprotic weak acid,
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