HomeworkLib
Question

A cyclohexane (c-hex) solution is prepared by fully dissolving 9.11g of a newly synthesized organic compound...

A cyclohexane (c-hex) solution is prepared by fully dissolving 9.11g of a newly synthesized organic compound in 100.g cyclohexane. The freezing point of the solution is depressed by -5.80 oC from the normal freezing point of 6.55 oC for pure cyclohexane ( Kf,c-hex= 20.0 oC kg/mol , MWc-hex = 84.0 g/mol).

(a) What is the molecular weight (molar mass) of the organic compound?

(b) What is the vapor pressure of the cyclohexane for this solution at 298K?

science   chemistry   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Answer:-

This question is solved by using the simple concept of calculation of depression in freezing point and lowering of vapor pressure.

The answer is given in the image,

0 0
Add a comment
Know the answer?
Add Answer to:
A cyclohexane (c-hex) solution is prepared by fully dissolving 9.11g of a newly synthesized organic compound...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • A solution is prepared by dissolving 3.04 g of an unknown nonelectrolyte in 16.00 g of...

    A solution is prepared by dissolving 3.04 g of an unknown nonelectrolyte in 16.00 g of cylcohexane (tf = 6.6 oC and kf = 20.0 oC/m). What is the molar mass of the unknown compound if the solution has a freezing point of -6.7 oC? Please see https://youtu.be/lwWZ5hdB61M for assistance. Mm = g/mol

  • Calculate the molar mass of naphthalene, the organic compound in mothballs, if a solution prepared by...

    Calculate the molar mass of naphthalene, the organic compound in mothballs, if a solution prepared by dissolving 7.50 g of naphthalene in exactly 150 g of benzene has a freezing point 2.0°C below that of pure benzene. (Kf of benzene is 5.12°C/m.)

  • p-dichlorobenzene is an organic molecular (covalent) compound with i = 1 and Kf = 7.10 oC/m...

    p-dichlorobenzene is an organic molecular (covalent) compound with i = 1 and Kf = 7.10 oC/m A student weighed 11.20 mL of p-dichlorobenzene and recorded mass of it as 10.820 g. The freezing point of the pure p-dichlorobenzene liquid was determined as 53.1 oC. 1.118 g of an unknown solid compound was added and completely dissolved in the previous sample of pure p-dichlorobenzene liquid. The freezing point determination procedure was conducted for the solution and the freezing point of this...

  • 2. A solution is prepared by dissolving 7.00 g of glycerin (C3H8O3) in 201 g of...

    2. A solution is prepared by dissolving 7.00 g of glycerin (C3H8O3) in 201 g of ethanol (C2H5OH). The freezing point of the solution is __________°C. The freezing point of pure ethanol is -114.6 °C at 1 atm. The molal-freezing-point-depression constant (Kf) for ethanol is 1.88 °C/m. The molar masses of glycerin and of ethanol are 92.1 g/mol and 46.1 g/mol, respectively.

  • A solution is prepared by dissolving 2.00 g of glycerin (C3H8O3) in 201 g of ethanol...

    A solution is prepared by dissolving 2.00 g of glycerin (C3H8O3) in 201 g of ethanol (C2H5OH). The freezing point of the solution is _______ degrees celsius. The freezing point of pure ethanol is -114.6 degrees celsius at 1atm. The molal-freezing point depression constant (Kf) for ethanol is 1.99 degrees celsius/m. The molar masses of glycerin and of ethanol are 92.1 g/mol and 46.1 g/mol, respectively.

  • If you can please explain step by step for each question. Problem 1, Question 1. Cyclohexae,...

    If you can please explain step by step for each question. Problem 1, Question 1. Cyclohexae, C6H12, melts at 6.55 oC and has a freezing point depression constant of kfp = -20.0 oC/m (where m is molality). You want to determine the molar mass of an unknown pure compound using the colligative property of freezing point depression. You weigh out 83.561 g of cyclohexane, and confirm that its melting point is 6.55 oC. You then mix 2.566 g of your...

  • A solution is prepared by dissolving 11.10 g of an unknown non-electrolyte solute in 78.64 g...

    A solution is prepared by dissolving 11.10 g of an unknown non-electrolyte solute in 78.64 g of cyclohexane. The freezing point of the solution is found to be 2.06 oC. What is the molar mass of the unknown solute in g/mol? Please report your answer with 3 significant figures. Answer g/mol

  • Cyclohexane has a freezing point of 6.50 °C and a Kf of 20.0 °C/m. What is...

    Cyclohexane has a freezing point of 6.50 °C and a Kf of 20.0 °C/m. What is the freezing point of a solution made by dissolving 0.694g of biphenyl (C12H10) in 25.0 g of cyclohexane? 3)

  • A solution was prepared by dissolving 1.846 grams of an unknown compound (nonelectrolyte) in 15.75 grams...

    A solution was prepared by dissolving 1.846 grams of an unknown compound (nonelectrolyte) in 15.75 grams of water (Kf = 1.86 oC/m). The solution freezes at -1.50 oC. If pure water freezes at 0.00 oC, what's the molar mass of unknown compound?

  • Molar Mass of a Solute The freezing point of cyclohexane is 6.50°C. For cyclohexane solvent Kf=20.0....

    Molar Mass of a Solute The freezing point of cyclohexane is 6.50°C. For cyclohexane solvent Kf=20.0. 0.147 g of an unknown solute is dissolved in 7.71 g of cyclohexane (C6H12). The freezing point of the solution was 3.38°C. Calculate the corresponding molar mass of the solute. g/mol 1homework pts Submit Answer Tries 0/5 To the above solution a further 0.139 g of the unknown is dissolved. The freezing point of the resulting solution was 0.85°C. Calculate the corresponding molar mass...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT