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An aqueous CaCl2 solution has a vapor pressure of 81.6 mmHg at 50 °C. The vapor pressure of pure water at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent?
Calculate the concentration of all the species, ions, and molecules, and the pH of the following solutions. All solutions have a total volume of 1.00 liter and contain
25.00 ml aliquots of thiis solution was titrated with monoprotic strong base NaOH (0.0800 M). The titre volume of NaOH was 40.00ml. Calculate the molecular weight of H2A.
The proteins are given to you as 10mM solutions in phosphate buffer. You acquire UV-Vis spectra of the solutions to compare to your unknown mixture.
A solution is prepared by dissolving 6.00g of an unknown nonelectrolyte in enough water to make 1.00L of solution. The osmotic pressure of this solution is .750atm at 25.C. What is the molecular weight (g/mol) of the unknown solute
the partial pressure of oxygen in the atomsphere is 0.20 atm, what is the solubility of dissovled oxygen in blood? recall that the soulibilty of oxygen constant
The Heisenberg uncertainty principle as well holds for energy and time, two complimentary variables. Explain how well can we know the energy of molecular excited states with lifetimes of a)10 micro seconds; b)10 ns and c)10 ps.
Climbers sometimes develop Acute Mountain Sickness (AMS) when ascending too rapidly without allowing their bodies time to acclimate to the lower oxygen concentrations in air at high elevations.
What is the total mass of bovine serum albumin (BSA) in 50 ml of BSA at 4% (wt./vol), given in milligrams? What is the answer in micrograms?
An aqueous solution of an unknown ruthenium salt is electrolyzed by a current of 2.50 A passing for 50.0 minutes. If 2.618 g Ru is produced at the cathode, what is the charge of the ruthenium ions in solution
CO + 2 H2 -----> CH3OH. A synthesis gas stream consisting of 66.90% H2, 32.70% CO, and 0.400% CH4 (by mole) is fed into the process described below at a rate of 100 mol/hour. The effluent stream from the reactor is fed into a separator where the m..
Find concentration of each ion present in the solution formed by mixing: 44.0 mL of 0.150M Na2SO4 and 25.0 mL of 0.200M KCl.
What mass of Fe would be contained in a 80.0 g sample of magnetite ore that is 76.0% Fe3O4. Assume no other form of Fe is present
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