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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
Write the complete solution in short and simple way
Use this mass and the dilution volumes to calculate the ACTUAL molarity of the sulfuric acid in the INITIAL solution.
you need 4.5l of nitric acid solution with ph 6. you have unlimited amounts of nitric acid solution with a hydronuim
One isotope has a mass of 44.0 amu and has a neutral abundace of 69.5% while the other isotope with the mass of 46.08 amu.
The mercury level in the open to atmosphere end of the manometer was 5.25 cm lower than the hydrogen gas end. The barometer reading was 27.55 in Hg, Compute the gas pressure in torr
A sample contains Ba3(PO4)2, CoS, AgCl, NH4Cl, and ZnS. Identify the precipitate after the addition of 6 M HCl, then H2S and 0.2 M HCl.
The vapor pressure of solid CO2 is 280 torr at -90 C and 105 torr at -100 C. What is teh value of delta G for the reaction CO2 s --> CO2 g at each temperature
In a titration expirement, if we were to replace KHP as the primary standard with CsHP, would the higher molecular weight of the new standard alter the molar ratio of the standardization of the Sodium Hydroxide titrant
Part B; Preparation of dephenylacetylenefrom dibromostilbene materials used in part B: ethanol, ethyleneglycol, potassium hydroxide, dibromostilbene
When 189.4 g of ethylene (C2H4) (molar mass= 28.05 g/mol) burns in oxygen to give carbon dioxide and water, how many grams of CO2 (molar mass= 44.01 g/mol) are formed? C2H4 + 3O2 --> 2 CO2 + 2H2O
Using the method of successive approximations, what is [H3O+] in 0.00500 M CH2ClCOOH(aq) (Ka=1.4x10^-3) and how many iterations (n) are needed to validate that a constant value had been obtained? Express [H3O+] using two significant figures, follo..
Friedel-Crafts alkylation of toluene (C6H5CH3) with tert-butyl chloride [(CH3)3CCl] and aluminum chloride (AlCl3) occurs
Question- For a particular process, 25 kJ of heat is absorbed and 15 kJ of work is done on the surroundings. What is U
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