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A particular unknown solid depresses the freezing point of PDB (Kf = 7.1oC/molal) by 3.5oC. If you dissolve the same solid in H2O (Kf = 1.86oC/molal) to the same final molality as you had it in the PDB, what would the change in freezing point be?
A piece of iron 12 mm by 15 mm has a mass of 3.6 grams. Explain what is the thickness of the piece of iron, in mm given that the density of iron is 7.8 g/cc
the pi electrons in benzene can be approximated as particles ona ring. calculate the diameter of this electron ring if
Describe in detail(ex:individual resins used, etc) the purification of a protein from bovine live that has the following characteristics: Molecular weight of 86,500, pI= 8 and precipitates out of solution at 30% ammonium sulfate
A cylinder with a piston contains 897 ml of dry oxygen at a pressure of 582 mm Hg and a temperature of 327 K. If the temperature is reduced to 286 K and the pressure increased to 628 mm Hg what is the new volume ?
predict whether solutions of the following salts are acidic, basic, or neutral.
Nitrogen monoxide (NO) and nitrogen dioxide (NO2) are toxic, corrosive gases that significantly lower blood pressure when inhaled. How are these gases produced in experiments? What should you do to protect yourself against their toxicity
Dry ice is solid carbon dioxide. A 1.87g sample of dry ice is placed in an evacuated 4.03 L vessel at 22 degrees C. Calculate the pressure inside the vessel after all the dry ice has been converted to CO2 gas
The empirical formula of a compound is found to be P2O5. Experiments show that the molar mass of the compound is 560g/mol. What is the molecular formula of the compound?
A 11.5 g sample of an aqueous solution of hydroiodic acid contains an unknown amount of the acid.
Compound X is 2-propanol. When compound X is heated with strong acid, it dehydrates to form compound Y(C3H6) When compound X is oxidized, compound Z(C3H6O) forms, which cannot be oxidized further
Based on a K_c value of 0.210 and the data table given, what are the equilibrium concentrations of XY, X, and Y, respectively
If this reaction is only 92.0% efficient and 424 g of the ferric oxide is required to make 4.20 mol iron, what is the percent purity of the ferric oxide?
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