menu
Qammunity.org
Login
Register
My account
Edit my Profile
Private messages
My favorites
At 25 degrees C, the vapor pressure of pure water is 23.76mmHg and that of a urea solution is 22.98mmHg. Calculate the molality of the solution.
Ask a Question
Questions
Unanswered
Tags
Categories
Ask a Question
At 25 degrees C, the vapor pressure of pure water is 23.76mmHg and that of a urea solution is 22.98mmHg. Calculate the molality of the solution.
asked
Jan 28, 2017
85.9k
views
1
vote
At 25 degrees C, the vapor pressure of pure water is 23.76mmHg and that of a urea solution is 22.98mmHg. Calculate the molality of the solution.
Physics
high-school
Cameron Lee
asked
by
Cameron Lee
7.9k
points
answer
comment
share this
share
0 Comments
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1
Answer
7
votes
XA = PA/PA^0
XA = 22.98/23.76 = 0.9671
0.9671 : 0.0328
bi = ni/msolvent
0.9672 * 18.015/1 mol = 17.42 g H2O
bi = 0.0328 mol urea/17.42 g H2O * 1000
bi = 1.88 m
hope this helps
Khituras
answered
Feb 3, 2017
by
Khituras
7.9k
points
ask related question
comment
share this
0 Comments
Please
log in
or
register
to add a comment.
← Prev Question
Next Question →
Related questions
asked
Jun 26, 2021
42.7k
views
A gas occupies 200ml at a temperature of 26 degrees Celsius and 76mmHg pressure. Find the volume at -3degree Celsius with the pressure remaining constant.
Bensstats
asked
Jun 26, 2021
by
Bensstats
8.6k
points
Chemistry
high-school
1
answer
2
votes
42.7k
views
asked
Mar 22, 2024
62.3k
views
A solution prepared by dissolving 66.0 g of urea (NH2)2CO in 950 g of water had a density of 1.018 g mL–1. Express the concentration of urea in a- weight-percent; b- mole fraction; c- molarity; d- molality.
Ben Cochran
asked
Mar 22, 2024
by
Ben Cochran
8.0k
points
Chemistry
college
1
answer
3
votes
62.3k
views
asked
Dec 14, 2018
151k
views
Determine the molality of an aqueous solution that is 15.5 percent urea by mass.
Denoise
asked
Dec 14, 2018
by
Denoise
8.4k
points
Chemistry
college
1
answer
1
vote
151k
views
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.
9.4m
questions
12.2m
answers
Other Questions
At sea level, water boils at 100 degrees celcius and methane boiled at -161 degrees celcius. Which of these substances has a stronger force of attraction between its particles? Explain your answer
A snowball is launched horizontally from the top of a building at v = 16.9 m/s. If it lands d = 44 meters from the bottom, how high (in m) was the building?
What type of rock is the Haystack rock (igneous, Metamorphic, or Sedimentary)
what is a device that transforms thermal energy to mechanical energy
How many light sources do you know Pls list them
Twitter
WhatsApp
Facebook
Reddit
LinkedIn
Email
Link Copied!
Copy
Search Qammunity.org