Question

At 25o C the vapor pressure of pure benzene is 0.1252 atm. If we dissolve 9...

At 25o C the vapor pressure of pure benzene is 0.1252 atm. If we dissolve 9 g of an unknown hydrocarbon in 88.9 g of pure benzene (MW = 78.0 g/mol), we observe that the vapor pressure of the benzene in the resulting solution is 0.1191 atm. What is the molecular weight of the unknown solid (in g/mol)?

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
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
Similar Questions
At 25o C the vapor pressure of pure benzene is 0.1252 atm. If we dissolve 9...
At 25o C the vapor pressure of pure benzene is 0.1252 atm. If we dissolve 9 g of an unknown hydrocarbon in 88.9 g of pure benzene (MW = 78.0 g/mol), we observe that the vapor pressure of the benzene in the resulting solution is 0.1191 atm. What is the molecular weight of the unknown solid (in g/mol)?
compound with the empirical formula C8H5 is dissolved in benzene at 25°C. When 10.0 g of...
compound with the empirical formula C8H5 is dissolved in benzene at 25°C. When 10.0 g of the compound are dissolved in 100 g of benzene, the vapor pressure above the resulting solution is 91.64 mm Hg. If the vapor pressure of pure benzene is 95.18 mm Hg at 25°C, calculate the molecular weight and determine the molecular formula of the compound. You may assume the compound is nonvolatile and that benzene obeys Raoult’s law in the solution.
The vapor pressure of benzene is 73.03 mm Hg at 25°C. How many grams of estrogen...
The vapor pressure of benzene is 73.03 mm Hg at 25°C. How many grams of estrogen (estradiol), C18H24O2, a nonvolatile, nonelectrolyte (MW = 272.4 g/mol), must be added to 240.8 grams of benzene to reduce the vapor pressure to 71.04 mm Hg ? benzene = C6H6 = 78.12 g/mol. ________g estrogen
The vapor pressure of pure liquid water is p*(H2O) = 0.02308 atm. Above an aqueous solution...
The vapor pressure of pure liquid water is p*(H2O) = 0.02308 atm. Above an aqueous solution with 122 g of a non-volatile solute (molar mass 241 g/mol) in 920 g H2O has a vapor pressure of 0.02239 atm. Calculate the activity and the activity coefficient of water in the solution.
When 8.05 g of an unknown compound X was dissolved in 100 g of benzene C6H6,...
When 8.05 g of an unknown compound X was dissolved in 100 g of benzene C6H6, the vapor pressure of the benzene decreased from 100 torr to 94.8 torr at 26 degrees C. (MW C6H6 =78.0 g/mol.) a.) What is the mole fraction for unknown compound X? b.) What is the molar mass of unkown compound X?
(a) Air contains 5.2 ppmV of Helium at STP (25o C and 1 atm). Determine the...
(a) Air contains 5.2 ppmV of Helium at STP (25o C and 1 atm). Determine the concentration of Helium in ug/L at same condition. (Mw of Helium=2) (b) EPA limits (maximum allowable) benzene (C6H6) concentration in gasoline to 1.3% by weight. If both Benzene and Gasoline has a density of 0.84 g/mL, what is maximum allowable concentration of Benzene in ppmM.
The vapor pressure of pure water at 25.0 oC is 23.8 torr. What is the vapor...
The vapor pressure of pure water at 25.0 oC is 23.8 torr. What is the vapor pressure (at 25.0 oC), in atm, of an aqueous solution of 54.0 g glucose (C6H12O6), MM = 180. g mol-1) in 285.0 g of water? 760 torr = 1 atm P1 = X1Po1 Circle your choice. a) 0.0451 b) 0.194 c) 0.0307 d) 0.105 e) 0.146 f) 0.0287
A benzene-toluene solution with xbenz=0.300 has a normal boiling point of 98.6 C. The vapor pressure...
A benzene-toluene solution with xbenz=0.300 has a normal boiling point of 98.6 C. The vapor pressure of pure toluene at 98.6 C is 533 mmHg. What must be the vapor pressure of pure benzene at 98.6 C?
At 20 ∘C the vapor pressure of benzene C6H6 is 75 torr and that of toluene...
At 20 ∘C the vapor pressure of benzene C6H6 is 75 torr and that of toluene C7H8 is 22 torr. Assume that benzene and toluene form an ideal solution. a) In a solution composed of benzene and toluene that has a vapor pressure of 37 torr at 20 ∘C, what is the mole fraction of benzene? b) In a solution composed of benzene and toluene that has a vapor pressure of 37 torr at 20 ∘C, what is the mole...
) Pure benzene, C6H6, has a density of 0.8765 g/ml, a freezing point of 5.45oC and...
) Pure benzene, C6H6, has a density of 0.8765 g/ml, a freezing point of 5.45oC and a boiling point of 80.2oC. Its freezing point depression constant, Kf, is 5.07oC/m. A solution was made by taking 24.20 grams of an unknown non-electrolyte and dissolving it in 125.0 grams of benzene. The measured freezing point of the solution was -1.65oC. Calculate the molecular weight of the unknown substance. 258 g/mole 145 g/mole 138 g/mole 272 g/mole 595 g/mol
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT