Question
Asked Jan 24, 2020
58 views

A 20.0% aqueous solution by mass of urea (CH4N2O) has a density of 1.055g/mL. What is the molality of urea in this solution? What is the molarity of the same solution

check_circle

Expert Answer

star
star
star
star
star
1 Rating
Step 1

Given information:

  • 20% aqueous solution by mass of urea
  • Density of solution is 1.055 g/mL
Step 2

20% aqueous solution by mass of urea, that means a solution contains 20 g of urea and 100 g of water.

The mass of urea is 60.07 g/mol. The mole of urea is calculated as follows:

Chemistry homework question answer, step 2, image 1
fullscreen
Step 3

The molality is calcula...

Chemistry homework question answer, step 3, image 1
fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in
ScienceChemistry

General Chemistry

Related Chemistry Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: Please help and show answers and explain clearly

A: pKa value is more less acidic nature, this can be explained by deprotonation.

question_answer

Q: How do I solve number 11?

A: The density of the substance can be described as the mass of the substance per unit volume. The chan...

question_answer

Q: How much heat is evolved in converting 1.00 molmol of steam at 135.0 oC to ice at -45.0 oC? The heat...

A: Number of mol of water = 1molSo, amount of water = 18 gInitial temperature, Ti = 135 oCFinal tempera...

question_answer

Q: What is the best way to increase the solubility of a gas in a solvent in which the gas does not reac...

A: Solubility of gas is defined as the the amount of gas that gets dissolved in solvent. 

question_answer

Q: What is entropy? Why is entropy important in discussing the formation of solutions?

A: The degree of disorderness is referred to as entropy. Gas particles will have higher positive entrop...

question_answer

Q: Explain why the boiling point of Br2 (59°C) is lower than that of iodine monochloride, ICl (97°C), e...

A: Why the boiling point of Br2 (59°C) is lower than that of iodine monochloride, ICl (97°C) is to be e...

question_answer

Q: How many calories does she consume if she snacks on 1/2 cup of chocolate chips a day ? There are 70 ...

A: Units used for conversion is,1 cup = 16 tablespoonHence, ½ cup = 8 tablespoon

question_answer

Q: For magnesium, the first ionization potential is 7.6 eV; the second (the additional energy required ...

A: The atomic number of magnesium is 12. Its electronic configuration is 1s22s22p63s2.The first ionizat...

question_answer

Q: Calculate the number of miles of solute present in each of the following solutions(a) 255ml of 1.50 ...

A: Click to see the answer