Night!
Almost got one more finished than only 4 more to go. I may just skip out on the math work. I'll make up for it later.
Problems like this:
The vapor pressure of water is 23.76 mm Hg at 25oC.
How many grams of urea , CH4N2O, a nonvolatile, nonelectrolyte (MW = 60.10 g/mol), must be added to 240.9 grams of water to reduce the vapor pressure to 23.16 mm Hg ?
water = H2O = 18.02 g/mol.