Posted by **paula** on Sunday, February 13, 2011 at 12:08am.

I am still having a little problem with my original question. However, this is what I have done so far.

I am not sure what to do with the density of the solution of 0.78 g/mL.

The answer I came up with is 5.47 mol/kg. I found the density of the water in grams then I converted it to kg (152 x .001 = .152. I divided 50 g by the molar mass of 60.09502 g/mol = .8320 moles. Next, I divided that by .152. However, I didn't use the .78 g/mL beacause I am not sure what to do with it. Please explain.

ORIGINAL QUESTION - what is the molality of a solution of 50.0 grams of propanol in 152 mL water if the density of wate is 1.0 g/mL and the density of the solution is 0.78 g/mL

- chem -
**DrBob222**, Sunday, February 13, 2011 at 4:03pm
I answered this for you last night just before retiring to bed. You don't need the 0.78 g/mL density of the solution. The answer is 5.47 molal. The question was to determine the molality of the solution; 5.47 m (mol/kg is molality) is the correct answer.

- chem -
**amelia**, Saturday, February 26, 2011 at 1:26pm
i have this question for an online assignment and it keeps telling me that 5.47 is wrong. so my guess is that you do need the density...just saying

## Answer This Question

## Related Questions

- Chem - I'm having a lot of trouble with a simple problem. I have a 3.0% by man ...
- Algebra - The answer in the book however says -(5x^2-17x-9)/(x-3)(x+2) so I don'...
- science(chem) - Commercial hydrazine is sold as a 64% solution. Using that as ...
- Chem exam - I'm tyring to study for my chem exam and I cant figure out how to do...
- Stuck on Algebra 1 - This is kind of like the first question I asked, and I'm ...
- Chemistry- Drbob-help#3 - I still need help with #3 I'm not sure how I got 1.14M...
- Mathematiczz (The Problem Solving) - A girl kept every doll she had receive ...
- Business Communication - Which way of asking for action carries the highest ...
- physics - This is my problem: A particle with a density of 0.9g/ml is suspended ...
- math,help,factoring - i need help i don't know how to do the next step. factor ...

More Related Questions