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For each pair of amino acids listed below, predict which one would be first to elute from a cation-exchange column. Assume the buffer pH begins at 3.25 and is increased in a stepwise fashion to pH 6.
a) Asp, Glu d) Lys, Phe
b) Ser, Val e) Leu, Val
c) Phe, Ala f) Gly, Ala
Calculate the number of lines per centimeter that should be etched in the grating for each of the following conditions:(a) A first order diffraction angle (?) of -27° for visible light of 600 nm wavelength
A magnesium goes from its grond state to its first electronically excited state. I assume the ground state is a singlet.
A solution of ethanol (C2H5OH) in water is prepared by dissolving 56.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 255.0 mL of solution. What is the molarity of the ethanol in this solution?
Aluminum has a specific heat of 0.900 J/g·°C. How much energy is required to raise the temperature of 160. g of aluminum from 20.0°C to 183.0°C?
how would you synthesize 2-ethyl-1,3-hexanediol in the lab setting? starting from simple organic compounds such as benzene
Calculate the amount of heat required to raise the temperature of 72 g of H2O from 23 degrees celcius to 115 degrees celcius
Based off of pka values of 10 for phenol and 6.4 for carbonic acid, would sodium bicarbonate be a suitable base for separating phenol from a neutral organic compound via aqueous extraction?
calculate the enthalpy change for the complete combustion of but-1-ene, according to the following equation.
If there is a phasechange you need to then write a net ionic equation and list the spectator ions barium chloride plus silver nitrate equals barium nitrate plus silver chloride
Calculate the pH across the inner mitochondrial membrane that is necessary to drive ATP synthase under steady state conditions at 25oC
How much heat is required to melt 15 grams of ice at 0C? How much heat is released when 100 grams of steam condenses at 100C? If a system of ice and water has a mass of 12 grams
What would be the temperature change of 450ml of water that surrounds this ice cube assuming all the heat was transfered form the surrounding water.
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