HomeworkLib
Question

please help! is #7 right? and please help me do #8

7. The vapor pressure above a sugar-water solution at 25°C is 21.4 torr. What is the mole fraction of sugar in the solution?

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

Homework Answers

Request Professional Answer

Request Answer!

We need at least 10 more requests to produce the answer.

0 / 10 have requested this problem solution

The more requests, the faster the answer.

Request! (Login Required)

All students who have requested the answer will be notified once they are available.
Know the answer?
Add Answer to:
please help! is #7 right? and please help me do #8 7. The vapor pressure above...
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

Similar Homework Help Questions

  • 7. The vapor pressure of water at 25.0°C is 23.8 torr. Determine the mass of glucose...

    7. The vapor pressure of water at 25.0°C is 23.8 torr. Determine the mass of glucose (molar mass = 180 g/mol) needed to add to 500.0 g of water to change the vapor pressure to 23.3 torr. (20 points) Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. If 0.455 g of thyroxine is dissolved in 10.0 g of benzene, the freezing point of the solution is found to...

  • A nonvolatile, non-dissociating solute was dissolved in 12.0 g of benzene (C6H6). The freezing point of...

    A nonvolatile, non-dissociating solute was dissolved in 12.0 g of benzene (C6H6). The freezing point of the solution was measured as 1.3 °C, while pure benzene freezes at 5.5 °C. If pure benzene has a vapor pressure of 75 torr, what is the vapor pressure of this solution. For benzene, Kf = 5.12 °C/m and Kb = 2.53 °C/m.

  • 1-Calculate the vapor pressure of a solution of 0.34 mol of cholesterol in 4.4 mol of...

    1-Calculate the vapor pressure of a solution of 0.34 mol of cholesterol in 4.4 mol of toluene at 32°C. Pure toluene has a vapor pressure of 41 torr at 32°C. (Assume ideal behavior.) 2-The freezing point of benzene is 5.5°C. What is the freezing point of a solution of 3.60 g of naphthalene (C10H8) in 655 g of benzene (Kf of benzene = 4.90°C/m)? 3-In a study designed to prepare new gasoline-resistant coatings, a polymer chemist dissolves 6.015 g poly(vinyl...

  • The vapor pressure of pure benzene (C6H6) at 25°C is 94.4 torrwhile the vapor pressure of...

    The vapor pressure of pure benzene (C6H6) at 25°C is 94.4 torrwhile the vapor pressure of pure chloroform (CHCl3) at 25°C is 172 torr. An ideal solution isformed when 50 g of chloroform is added to 50 g of benzene. Calculate the vapor pressure of chloroform over thischloroform-benzene solution at 25°C. a) 86 torr b) 68 torr c) 148 torr d) 125 torr e) 172 torr

  • An aqueous CaCl2 solution has a vapor pressure of 80.2 mmHg at 50 ∘C. The vapor...

    An aqueous CaCl2 solution has a vapor pressure of 80.2 mmHg at 50 ∘C. The vapor pressure of pure water at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent? A hypothetical solution forms between a solid and a liquid. The values of the thermodynamic quantities involved in the process are shown in the following table. Action Enthalpy separation of solute 11.5 kJ/mol separation of solvent 21.8 kJ/mol formation of solute-solvent interactions -86.7 kJ/mol solute...

  • 7. Consider the expression of Raoult's law, Psolution = Xsolvent ·P⁰solvent . Here, Psolution = vapor...

    7. Consider the expression of Raoult's law, Psolution = Xsolvent ·P⁰solvent . Here, Psolution = vapor pressure of the solution, P⁰solvent  = vapor pressure of pure solvent, Xsolvent  = mole fraction of the solvent. What is the mole fraction of solvent in a solution with a vapor pressure of 47.90 torr, if the vapor pressure of the pure solvent is 52.82 torr? 8. The boiling point of a solution increases directly as a function of the number of moles of...

  • An aqueous CaCl2 solution has a vapor pressure of 80.2 mmHg at 50 ∘C. The vapor pressure of pure water at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent? A hypotheti...

    An aqueous CaCl2 solution has a vapor pressure of 80.2 mmHg at 50 ∘C. The vapor pressure of pure water at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent? A hypothetical solution forms between a solid and a liquid. The values of the thermodynamic quantities involved in the process are shown in the following table. Action Enthalpy separation of solute 11.5 kJ/mol separation of solvent 21.8 kJ/mol formation of solute-solvent interactions -86.7 kJ/mol solute...

  • An aqueous solution of ethylene glycol, C2H6O2 has a vapor pressure of 22.4 torr at a...

    An aqueous solution of ethylene glycol, C2H6O2 has a vapor pressure of 22.4 torr at a temperature of 25 C. What would be the normal boiling point of this solution? the Kb of water is 0.52 C/m and the vapor pressure of water at 25 C is 23.8 torr.

  • please please answer both questions . Thank you !!! Question 9 (1 point) Benzene and toluene...

    please please answer both questions . Thank you !!! Question 9 (1 point) Benzene and toluene form an ideal solution. At 298 K, what is the mole fraction of benzene in the liquid that is in equilibrium with a vapor that has equal partial pressures of benzene and toluene? At 298 K, the vapor pressures of pure benzene and pure toluene are 95 and 28 tor respectively 0.50 0.77 0.23 0.30 none of these Question 10(1 point) 340.0 g of...

  • Can all questions be answered please 39-49 39. The vapor pressure of pure water at 25...

    Can all questions be answered please 39-49 39. The vapor pressure of pure water at 25 °C is 23.8 torr. What is the vapor pressure (torr) of water above a solution prepared by dissolving 18.0 g of glucose (a nonelectrolyte, MW- 180.0 g mol) in 95.0 g of water? A) 24.3 B)234 C0451 D) 0.443 E) 23.8 40. What is the freezing point (C) of a solution prepared by dissolving 11.3 g of(formula weight 164 g/mol) in 115 g of...

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