2.8 g of the nonvolatile solute sucrose (C12H22O11) is added to 517 g of water at 25oC. What will be the partial pressure of the water vapor over this solution?

Answer 1

Isn't partial pressure =
P = P^o*X_o ?
So convert g of solvent to mole fraction and multiply by the normal vapor pressure of the solvent. Post your work if you get stuck.

Answer 2

So 2.8 converted to mols and then divided by 517? And multiplied by 25oC?

Answer 3

No.
mole fraction of solvent =
moles solvent/(moles solvent + moles solute)