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The velocity v with which a protein moves through water under the influence of an electric field varied with values of pH in the range 3.0<pH<7.0 according to the expression v/( ųms-1)=a+b(pH)+c(pH)^2+ d(pH)^3 with a=0.50, b=-0.10, c=-3.0*10^-3, and d=5.0*10^-4. Identify the isoelectric point of the protein.
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- Estimate the effective radius of a glycine molecule in water at 25 °C given that its diffusion coefficient is 1.055 × 10−9 m2 s−1 and that the viscosity of water is 1.00 cP.At 25 °C the molar ionic conductivities of F−, Cl−, and Br− are 5.54 mS m2 mol−1, 7.635 mS m2 mol−1, and 7.81 mS m2 mol−1, respectively. What are their mobilities?Suppose the concentration of a solute varies along the length of a container according to c(x) = c0 - βc0x2, where c0 is the concentration at x = 0. Calculate the thermodynamic force on the solute at 25 °C and x = 8 cm and 16 cm given that the concentration falls to 1/2c0 when x = 15 cm. Hint: Start by finding the value of β.
- draw and sketch a group for action poyential polarization phases with membrane potential vm in milivoltsfactors which would contribure to departure from Nernstian behaviour.Substances A and B with capacity factors 6.3 and 11.4, respectively, are being carried by a mobile phaseflowing at a velocity of 0.53 mm/s. What is the length of a column required to separate these two substanceswith a resolution of 1? Assume that the sample zones for both A and B broaden based on the van Deemter equation H = 0.35 + 0.48/u+ 0.57u where Hand u are expressed in µm and mm/s, respectively.
- At 298 K, the electrolytic conductivity of a 0.2 M KC1 solution is 2.50 X 10-2S cm-1. Calculate its molar conductivity.What is the contribution to the total molar energy of (a) the kinetic energy, (b) the potential energy of interaction between hydrogen chloride molecules in a gas at 298 K when 0.50 mol of molecules are confined to 1.0 dm3? Is thekinetic theory of gases justifiable in this case?Calculate the Molar conductivity From the given specific conductivities at infinite dilution 1.237 x 10 11.85x 10+ m 23.]5 ' ]04 0! 106.74 x 10~
- The osmotic pressure of a solution of polystyrene in toluene (methylbenzene) was measured at 25 °C with the following results: c/(g dm− 3) 2.042 6.613 9.521 12.602 P/Pa 58.3 188.2 270.8 354.6 Determine the molar mass of the polymer. Molar Mass = __________ kg/mol.The bulk modulus for liquid water at 298 K is 3.4 GPa. If it is assumed that the molecules are interacting with a Lennard-Jones potential energy, estimate the well depth ε (give your answer in kJ mol−1).What is the strength of the ionic interactions between an ion with 1 positive charges and an ion with 2 negative charges, when the distance between them is 32.5 nanometers and the solvent is water, at 25 oC with a dielectric constant of 78.5? Calculate answer to 7 decimal places.specify units in the answer. Thank you very much for your assistance.