Estimate the vapor pressure of seawater at 20°C given that the vapor pressure of pure water is 2.338 kPa at that temperature and the solute is largely Na+ and Cl- ions... each present at about 0.50 mol/dm3.

Can you please answer number 8 and show all of the steps to the solution

2. A and B form an ideal solution. At a total pressure of 0.90 bar, Xa(1)=0.65, XA(g) = 0.45. Using this information, calculate the vapor pressures of pure A and pure B.

The molar mass of liquid A = 85.0 g / mole, that of B = 112.0 g / mole. At 100 C, a solution of mass percentage in A equal to 30.0%, considered ideal, has a vapor pressureof equilibrium equal to 110 kPa. The vapor in equilibrium with this solution has a mole fraction of A equal to 0.450.(a) Determine the mass of A which must be added to 100 g of B to obtain a solution whosenormal boiling point is 100 C.   Please give the Answer