Question

When 20.0 grams of an unknown nonelectrolyte (i=1) compound are dissolved in 500.0 grams of benzene,...

When 20.0 grams of an unknown nonelectrolyte (i=1) compound are dissolved in 500.0 grams of benzene, the freezing point of the resulting solution is 3.77 °C. The freezing point of pure benzene is 5.444 °C and the Kf for benzene is 5.12 °C/m. What is the molar mass of the unknown compound?

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
A solution of 12.00 grams of an unknown nonelectrolyte compound is dissolved in 200.0 grams of...
A solution of 12.00 grams of an unknown nonelectrolyte compound is dissolved in 200.0 grams of benzene. The resultant solution freezes at 3.45oC. What is the molar mass of the unknown compound? [The freezing point of pure benzene is 5.45oC ; the Kf for benzene is 5.07oC m-1]. (Hint: this is a two-step challenge, involving first finding the number of moles of solute in the solution from the freezing point data and then its molar mass in units of grams/mole)...
A 8.50-gram sample of a compound is dissolved in 250. grams of benzene. The freezing point...
A 8.50-gram sample of a compound is dissolved in 250. grams of benzene. The freezing point of this solution is 1.02°C below that of pure benzene. What is the molar mass of this compound? (Note: Kf for benzene = 5.12°C/m.) Ignore significant figures for this problem.
a solution of 10.00g of an unknown nondissociating compound dissolved in 100.00g of benzene freezes at...
a solution of 10.00g of an unknown nondissociating compound dissolved in 100.00g of benzene freezes at 3.45degree C. the Kf of benzene is 5.07degreeC/m. the freezing point of benzene is 5.45degreeC.
The freezing point of benzene, C6H6, is 5.500 °C at 1 atmosphere. Kf(benzene) = 5.12 °C/m...
The freezing point of benzene, C6H6, is 5.500 °C at 1 atmosphere. Kf(benzene) = 5.12 °C/m In a laboratory experiment, students synthesized a new compound and found that when 10.69 grams of the compound were dissolved in 260.5 grams of benzene, the solution began to freeze at 4.957 °C. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight they determined for this compound? _____g/mol
Benzene has a normal freezing point of 5.50°C and a molal freezing point depression constant of...
Benzene has a normal freezing point of 5.50°C and a molal freezing point depression constant of 5.12°C/m. A solution prepared by dissolving 0.335g of compound X in 5.00g of benzene has a freezing point of 1.34°C. Assuming that compound X is a nonelectrolyte, what is the molar mass of compound X?
1. The freezing point of benzene C6H6 is 5.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that...
1. The freezing point of benzene C6H6 is 5.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in benzene is cholesterol . If 10.34 grams of cholesterol, C27H46O (386.6 g/mol), are dissolved in 157.9 grams of benzene ... The molality of the solution is_______ m. The freezing point of the solution is________ °C. 2.The boiling point of ethanol CH3CH2OH is 78.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in ethanol is estrogen (estradiol). How many grams of estrogen, C18H24O2...
When 10.83 g of glucose was dissolved in 109.6 g of benzene, the freezing point was...
When 10.83 g of glucose was dissolved in 109.6 g of benzene, the freezing point was 275.8 K. What is the formula mass of this compound? The freezing point depression constant for benzene is 5.12 (°C*kg)/mol. The melting point and boiling points are 5.50°C and 80.10°C, respectively. Aren't only I able to obtain formula mass of glucose?
An aqueous solution containing 34.9 g of an unknown molecular (nonelectrolyte) compound in 130.0 g of...
An aqueous solution containing 34.9 g of an unknown molecular (nonelectrolyte) compound in 130.0 g of water has a freezing point of -1.4 ∘C. Calculate the molar mass of the unknown compound.
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?
The freezing point of benzene is 5.5 °C. What is the molar mass of a nonionizing...
The freezing point of benzene is 5.5 °C. What is the molar mass of a nonionizing solute if 1.49 grams of the solute added to 23.24 g of benzene lowers the freezing point to 3.4. The Kf of benzene is -5.12 °C/m. Record your answer as a whole number.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT