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The pI for amino acids is exactly half-way betwwn the pKa values for the two functional groups. Note that aspartma has the carboxylic acid functionality of phenylalanine. This leaves the aspartic acid amine group and the side chain carboxylic acid functional group of aspartic acid. Find the values for these two groups of as partic acid in table 26.1 and calculate a predicted pI value for aspartame?
most of the sulfur used in the united states is chemically synthesized from hydrogen sulfide gas recovered from natural
A 355 ml container holds .146g of Ne and an unknown amount of Ar at 35 degrees C and a total pressure of 26 mmHg. Calculate the moles of Ar present
An ion exchange column is used to separate single-stranded polynucleotides at pH 2. A gradient of increasing salt concentration is used for elution.
calculate the theoretical mass of ca2 ion in one tablet in grams if there is 750 mg caco3 and 320mg calcium per tablet.
An atom of aluminum (Al) has a diameter of about 1.2 10-8 cm. (a) What is the radius of a(n) aluminum atom in Angstroms (Å)? Å What is the radius of a aluminum atom in meters
A 635 mL sample of unknown solution reacts completely with to form 19.1g CO2 . What was the concentration of the solution?
There is an increase in temperature of 56 K. Calculate the heat lost or gained by the system in response to this change in the external temperature.
How is the rate of consumption of O2 related to the rate of consumption of NH3? (b) How is the rate of formation of NO related to the rate of consumption of NH3? (c) How is the rate of formation of H2O related to the rate of consumption of NH3?
a 0.0355 g sample of an unknown molecular compound is dissolved in 1.000 g of liquid camphor at 200.0degc. upon cooling
Adipic acid with melting point 151c is added to succinc acid of 185 c what is the effective in melting point
a mixture of 0.140 moles of C is reacted with 0.117 moles O2 in a sealed, 10.0 L vessel at 500 K, producing a mixture of CO and CO2. the total pressure is 0.640 atm. What is the partial pressure of CO
The latent heat of fusion for sodium is 2.6kJ/mol. How much heat is needed to melt 46g of sodium at its melting point of 98 degree Celcius?
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