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The dissolution of 5.25g of a substance in 565g of benzene at 298K raises the boiling point by 0.6225 deg celsius. Note that Kf=5.12K kg/mol, Kb=2.53K kg/mol, and the density of benzene is 876.6kg/m^3. Calculate the freezing point depression, the ratio of the vapor pressure above the solution to that of the pure solvent, and the molecular weight of the solute, Pbenzene=103 Torr at 298K.
What mass of iron (III) chloride in g is present in 2.50 ml of this solution
What is the pH of a solution prepared by mixing 25mL of .10M CH3CO2H with 25 mL of .010M CH3CO2Na? Assume that the volume of the solutions are additive and that Ka= 1.8 x 10-5 for CH3CO2H.
The IR spectrum of HCN shows three absorption bands at 3312 cm-1, 2089cm-1, and 712 cm-1. Assuming HCN is linear, assign vibrations to the three absorption bands
For each parameter listed, explain whether or not a change in the parameter will have an effect on the retention time of a compound.
What should be the concentration of the NaCl solution (in g/L) so that it will have the same osmotic pressure as the blood at 37 deg C
devise a general method for determining the fractional abundances of two or more isotopes from a mass spectrum. your method must include some means of measuring the signals
What is the final pressure in the container if 705 mL of helium gas at 205 mm Hg is compressed to 255 mL?
Determine the concentration of an unknown hydrochloric acid solution that requires 70.5 mL of 1.6 M barium hydroxide to completely neutralize
Describe what will be observed when a mixture of composition x_b=0.8 is heated, at each stage giving the number, composition, and relative amounts of the phases present.
suppose 45.0g of water at 85 C is added to 105.0 g of ice at 0 C. The molar heat of fusion of water is 6.01 kJ/mol, and teh specific heat if water is 4.18 J/g C. on this basis of these data (a) what will be the final temperature of the mixture and..
Determine the mass of copper(II) sulfate, CuSO4 will remain after removing all the H2O(water) from 74 grams of CuSO4 5H2O (Also called Blue Vitriol and Bluestone)?
draw the valid lewis structures of polyatomic ions in bro4-. determine the number of resonance forms for each structure
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