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The sedimentation coefficient of a certain DNA in 1M NaCl at 20C was measured by boundary sedimentation at 24,630 rpm. The following data were recorded:
Time Distance x of boundary from center (cm)
16 6.26932 6.35148 6.43864 6.51780 6.60596 6.681
a) Plot log x vs time and calculate the sedimentation coefficient
b) The partial specific volume of the sodium salt of DNA is 0.556 cm3/g. The viscosity and density of the 1M NaCl solution and of water are 1.104 cP, 1.04 g/cm3 and 1.005 cP, respectively. Calculate s20,w for the DNA
What is the mole fraction of NaCl in this solution? what would be the vapor pressure of this solution at 45C? The vapor pressure of pure water is 23.8 torr at 25 C and 71.9 torr at 45C
The solubility of oxygen gas at 50*C is 27.8 mg/L at an oxygen pressure of 1.00 atm. The solubility of nitrogen gas at 50*C is 14.6 mg/L at a nitrogen pressure of 1.00 atm. Assume that the air above the water contains an oxygen partial pressure of..
A solution of ammonia and water contains 3.00×10^25 water molecules and 5.80×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
draw the expanded structural formula for the drug. Pick one amino acid ionic group that can bind with the drug.
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Even though butanols have the same number of the same atoms, we see large differences in their ability to dissolve water. How do you account for this? How might you account for the much smaller differences observed among the pentanols
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Kn1 knowledge and understanding of atomic and molecular structure, chemical bonding, chemical formulas, chemical equations, mole calculations and the mole concept and the relation between elements of the Periodic Table.
How will you prepare the following solutions from 6.0 M solution of acetic acid? Give exact details. Assume that a 10-mL graduated cylinder (in which volumes can be read to the nearest 0.1 mL) and a 100-mL graduated cylinder are available.
What would the molecular orbital diagram for a compound made of equal portions of aluminum and phosphorous look like
Determine the following characteristics of the titration curve for 25.0 mL of 0.400 M NH3(aq) titrated with 0.335 M HI(aq). (For NH3, Kb = 1.8x10-5.) (1a) The initial pH : (1b) The volume of HI(aq) required to reach the equivalence point : (1c) Th..
Nitrogen is contained in a 300 ml vessel at 400 mm Hg and 10°C. How many grams of nitrogen are in the vessel?
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