The vapor pressure of pure water at 297 K is 2951.3 Pa. The vapor forms an ideal gas. a. In some oil, the equilibrium concentration of water molecules is only 1% as large as in pure water. Suppose that the pure water is covered with a layer of that oil. What's the equilibrium vapor pressure of water above the oil layer?
b. What's the vapor pressure of water at 297 K above a sugar solution in which 1/28 of the molecules are sugars, not water?

Describe in detail the melting point behavior of the 80: 20 benzoic acid-mandelic acid mixture

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.