Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
A solution is prepared from 42.0 g of a nonvolatile, nondissociating solute and 85.0 g of water.?
The vapor pressure of the solution at 60degree C is 142 torr. The vapor pressure of water at 60degree C is 150. torr. What is the molar mass of the solute? Ignoring the significant figures for this problem.
1 Answer
- Caroline MillerLv 710 years agoFavorite Answer
Pv solution = mole fraction water x vapor pressure water
142torr = (1-x)(150)
0.946 = x = mole fraction of water
therefore, the mole fraction of the solute = 0.053
moles water = 85g / 18g/mole = 4.72moles = 94.6% of the solution
4.72moles / 0.946 = 4.99moles total in the solution
4.99moles - 4.72moles = 0.272moles solute
42g / 0.272moles = 154.5g/mole
