posted by .

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 -

    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 -

    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

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Neutron star-universal gravitational problem

    Hi, i'm having problem w/ this question...i've tried everything i know and i still don't get the right's the info they give: Consider a neutron star of mass M = 1.99e+30kg and a radius of R = 10 km. They ask 3 question...two …
  2. Chem exam

    I'm tyring to study for my chem exam and I cant figure out how to do this question: The solubility of MgCl2 is 54.25 g per 100ml of water at 25 degrees C. A student prepares a 2.50 mol/L solution of MgCl2 and states it is a saturated …
  3. Mathematiczz (The Problem Solving)

    A girl kept every doll she had receive since she was a baby. Later, however, she decided to get rid of most of them. She discarded 1/3 of the collection. Then, she gave 2/3 of the remaining dolls to a little girl who lived nearby. …
  4. CHEM

    how do I work this question out?: 50.00g of NaCl are dissolved in water to give a solution that contains 2.500% NaCl by mass. The density of the solution is 1.030g/mL. The volume of the solution is: a)941.8mL; b)1.942L; c)2.500L; and,
  5. Chem

    I'm having a lot of trouble with a simple problem. I have a 3.0% by man solution of H2O2 in H2O. The density of thr solution is 1.0 g/mL. I need to find the molarity. How do I do this?
  6. Algebra

    The answer in the book however says -(5x^2-17x-9)/(x-3)(x+2) so I don't know what I am doing wrong, can you take me step by step through the problem. I have a lot of problems, but I think once I understand what I am doing wrong with …
  7. Stuck on Algebra 1

    This is kind of like the first question I asked, and I'm still having a little trouble on it. The Ordered pairs in each exercise are for the same direct variation. Find the missing value. (-2,8) and (x,12) I'm not sure how to work …
  8. science(chem)

    Commercial hydrazine is sold as a 64% solution. Using that as your starting material, how would you prepare a 5% solution of hydrazine?
  9. Business Communication

    Which way of asking for action carries the highest level of politeness?
  10. Chemistry- Drbob-help#3

    I still need help with #3 I'm not sure how I got 1.14M. I have tried to do the problem over, but I not coming up with my original answer of 1.14M. Somehow I am missing a step. Please show work for the 1.14M Thanks Question#9 reads …

More Similar Questions