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The distribution coefficient, K=concentration in hexanes/concentration in water, between hexanes and water solute A is 7.5 What weight of A would be removed from a solution of 10g of A in 100mL of water by a single extraction with 100 mL of hexanes? What weight of A would be removed by four successive extraction with 25-mL portions of hexanes? How much hexanes would be required to remove 98.5% if A in a single extraction?
An aqueous solution of KI has a freezing point of -1.70 C and an osmotic pressure of 26.5 atm at 25.0 C. What is the density ?
Calculate the rate constant of the catalyzed and uncatalyzed reactions. How many folds of rate enhancement are produced by the enzyme? The rate constant is 13.46 but what is the nuber of folds of enhancement that are produced by the enzyme?
Determine the Keq for the reaction of benzoic acid with 4-nitroaniline.
The sudden opening of the epiglottis and vocal cords releases this air explosively. Just prior to this release, what is the approximate pressure of the gas inside the lungs?
For an ensemble consisting of a mole of particles having two energy levels separated by 1000. cm-1, at what temperature will the internal energy equal 2.90kJ?
List the liquids in table 2 whose densities and boiling points most closely match those of the unknown liquid. List these liquids densities, boiling points, & solubilities.
consider the reaction CO2+H2=CO+H2O.The equilibrium concentrations are [CO]= 0.050M, [H2]=0.045M, [CO2]=0.086M, and [H2O]= 0.040M. Calculate K .
A chemist wanted to determine the concentration of a solution of lactic acid, HC3H5O3. She found that the pH of the solution was 2.59. What was the concentration of the solution.
In what order would the amino acids arginine, leucine, and lysine be eluted from a Dowex-1 column at pH 10.5? (b) In what order would glutamic acid
What is the change in air temperature(, assuming the heat from the steam is all absorbed by air)
How many grams of magnesium metal will react completely with 4.8 liters of 5.0 M HCl?
A 30 g sample of water at 280 K is mixed with 50 g of water at 330 K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
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