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The osmotic pressure of a fraction of poly(vinyl nchloride) in a ketone solvent was measured at 25°C. The density of the solvent (which is virtually equal to the density of the solution) was 0.798 g cm-3. Calculate the molar mass and the osmotic virial coefficient, B, of the fraction from the following data:
c/(g /102cm3)
0.200
0.400
0.600
0.088
1.000
h/cm
0.48
1.2
1.86
2.76
3.88
Given that the Ka of boric acid is 5.8x10^-10M, what is the pH of a 0.50M boric acid solution? Are there any good approximation available?
Determine how much energy will be required to heat 69.7 gal of H 2 O from 22 degree Celsius to 110 degree Celsius if it is given that 1.00 gal weighs 3.77 kg and water has a specific heat capacity =4.184 J/g C
SbCl3(s)+H2O(l) -> SbOCl(s)+2HCl(g) In this reaction what is the percentage of Cl in SbOCl and in 2HCl
Compute the molarity of a solution made by adding 31.0mL of concentrated perchloric acid (70.5 % by mass, density 1.67 g/mL) to some water in a volumetric flask, after that adding water to the mark to make exactly 250mL of solution.
Thermal measurements show that deltaH for the I---->II phase transition is -743.1 J/mole, and deltaS for the same transition is -17.0 J/K/mole. At what temperature are solids I and II in equilibrium
the force constant for h-br is 516 nm-1 assume that only h atom moves mass of h 1.67 x 10-27 kg . what would be the
Given that B(SiO) 640 kJ/mol, show that bond enthalpy considerations predict that silicon-oxygen compounds are likely to contain networks of tetrahedral with SiO single bonds
Calculate the empirical formula and then determine the molecular formula of this compound using the given molar mass. b) Draw three lewis structures for molecule that satisfies the octet rule for each atom.
An excess of aqueous silver nitrate, AgNO3 was added to precipitate the bromide ion as silver bromide. If 8.00g of the soluble salt produced 2.00g of silver bromide, what was the mass percentage of the chloride in the sample?
question calculate the pca of a solution that results from the mixing 50.0ml of 0.0100 m ca2 with the following
you have a buffer system made up of equimolar amount of carbonic acid,H2CO3, and sodium bicarbonate,NaHCO3. Write equations to show how this buffer behaves when (a) HCL is added and (b) NaOH is added.
scuba divers has a volume of 8.0 L and a pressure of 140 atm at 20 degrees C. What is the volume of air in the tank in liters at STP?
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