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?

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)