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?

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2

50.23 i believe is correct but don't quote me on that.