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Draw the most probable structure of the tripeptide Ser-Lys-Leu at pH =2, pH = 6 and pH =12.b) , estimate the pI of the tripeptide (use all pK's needed from the pK's table
A sample of gas in a balloon has an initial temperature of 41 degree celsius and a volume of 1770 L . If the temperature changes to 96 degrees celsius, and there is no change of pressure or amount of gas, what is the new volume,V2 ,of the gas
A solution is 89.8% by volume benzene(C6H6) in carbon tetrachloride at 20 degrees C. The vapor pressure of pure benzene at this temperature is 74.61 mmHg and it's density is 0.87865 g/cm^3;
The thermogram for the reaction is depicted below. The calorimeter constant is 28.1 J/ Celcius. Both solutions were initially at 21.31 Celcius. Calculate Delta Hrxn for the reaction.
Consider the halide ions as nucleophiles. Briefly explain why F-, the strongest base among the halide ions, is the best nucleophile in polar aprotic solvents while iodide, the weakest base, is the best in protic solvents.
Explain how the vapor pressure of a compound is related to the liquid-vapor equilibrium and its equilibrium constant.How would it vary with the addition of more liquid?
Determine whether each of the following salts will form a solution that is acidic, basic, or Ph -neutral. K2CO3, KCl, NH4ClO, CH3NH3Cl, Fe(Clo4)3
consider the compound sodium chloride. in the solid form is apperars white in color. however when heated it produces a
predict whether an aqueous solution of ammonium bicarbonate would be acidic, basic or netural. explain your answer, and support it with real data.
A buffer is prepared by mixing 453 mL of 0.143 M HCl with 983 mL of 0.848 M ammonia (NH3). Given that the Kb of NH3 is 1.8 x 10-5, calculate the pH of the solution.
Match the detector or detectors that can be used in gas chromatography for the detection of the following list of analytes. (More than one detector may be appropriate for a given analyte, and a given detector may be appropriate for more than one g..
How much heat in kilojoules is evolved in converting 2.00 mol of steam at 150 to ice at -35.0? The heat capacity of steam is 1.84 and that of ice is 2.09 .
A mixture initially contains A, B, and C in the following concentrations: [A] = 0.650 M, [B] = 1.35 M, and [C] = 0.300 M. The following reaction occurs and equilibrium is established: A+2B C
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