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The pKa of the ?-carboxyl group of phenylalanine is 1.83, and the pKa of its ?-amino group is is 9.13. Calculate the average net charge on phenylalanine if it is in a solution that has a pH of 8.40 (If the charge is positive, you do not need to enter a \+ \" sign.)
Explain the factors that affect the acidity of carboylic acids. Why does this matter/ give evidence to support your claims and use a reaction
how many grams of carbon dioxide are produced when 23.5 g of propanal react with excess oxygen in a combustion reaction
when an irregularly shaped chunk of silicon weighing 8.763 g was placed in a graduated cylinder containing 25.00 mL of water, the water level in the cylinder rose to 28.76 mL. What is the density of silicon in g/cm3?
Based upon what you know about acids and bases, and given that manganese will be reduced by sodium bisulfite, make a prediction about how the oxidation-reduction reaction will be affected by acidic
Atomic absorption spectrometry was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream
Write the complete stepwise mechanisms for reactions below. Show all intermediate structures and all electron flow with arrows.
What would be the pressure of the gas, in kPa, if it were transferred to a container at 24 degrees Celcius whose volume is 55.0 L.
How many vinylic hydrogens are there in 1-ethylcyclohexene? A. one B. two C. three D. four
If this energy were used to vaporize water at 100.0 degrees, how much water (in liters) could be vaporized.
A buffer solution is prepared by adding 32.8 grams of sodium acetate, NaC2H3O2 to 1.00 L of 0.500 M acetic acid, CH3CO2H. Ka = 1.8 x 10-5 for acetic acid.
A 5.00 L volume of ethane gas is heated from 298 K to 596 K. If the pressure remains constant, what is the final volume?
The density of a gaseous compound was found to be 1.23 g L-1 at 330 K and 25.5 kPa. What is the molar mass of the compound?
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