Thursday

August 21, 2014

August 21, 2014

Posted by **confusedkid** on Saturday, January 24, 2009 at 10:09pm.

1) 2.6 g of the nonvolatile solute sucrose (C12H22O11) is added to 465 g of water at 25oC. What will be the partial pressure of the water vapor over this solution?

_____ mmhg

2) The partial pressure of water above a solution of water and a nonvolatile solute at 25oC is 19.5 mm Hg. What is the mole fraction of the solute?

3)The boiling point elevation of a solution consisting of 2.53 g of a nonvolatile solute in 96.3 g of benzene is 0.7690 C. What is the molecular weight of the unknown solute?

____g/mol

( for this one i know i am suppose to figure out the moles of it then divide the grams by the mole. HOW DO I FIND OUT THE MOLES??)

- chemistry -
**DrBob222**, Saturday, January 24, 2009 at 10:34pmFor 1 and 2, I'll bet you can find the equations in your text under Raoult's Law. For #3, use delta T = Kb*m. You will need to look up Kb for benzene (look under boiling point elevation constant).

- chemistry -
**Anonymous**, Friday, May 14, 2010 at 5:01pma gaseous organofluorine compound has a density of 0.355 g/l at 307 degrees celsius

**Related Questions**

Brain freezer a.k.a. MATH - Please Help! Are all squares similar? I think that ...

Pre Calculs - The pH of a chemical solution is given by the formula pH = -log10...

Algebra - i need to use the quadratic formula 2 solve these 4 questions: 1. x(...

Supervision and Leadership - I need someone ele's thoughts on this scenario ...

Chemistry - Calculate delta H for this reaction: N2 + 3H2 --> 2NH3 I am given...

Science - The terms diffusion and osmosis seem to have similar meanings. Explain...

maths - Use the quadratic formula to solve the equation x^2-7x+9=0 I've tried to...

Statistics - This is the remaining part of Jackie's question:randomly selected ...

CRT205 - Other questions have been asked about the article "Contolling ...

English - I can't seem to remember this word. It's when someone ______ their ...