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Molecular weight

  • Chemistry
  • Thread starter mate1000
  • Start date
  • #1
11
0
WOuld someone be able to give us a hand for this question, im stumped.
Polyethylene is a synthetic polymer or plastic with many uses. 2.06 g of a polyethylene sample was dissolved in enough benzene to make 100 mL of solution, and the osmotic pressure was found to be 1.86 torr at 25oC. What is the molecular weight (g mol-1) of the polyethylene? (1 torr = 1 mm Hg, 1 atm = 760 mm Hg)
Cheers
 

Answers and Replies

  • #2
Borek
Mentor
28,296
2,681
How does osmotic pressure depend on the dissolved substances concentrations?
 
  • #3
mgb_phys
Science Advisor
Homework Helper
7,774
12
You have to make an attempt at the question - what relationships do you know about osmotic pressure and molecular weight?
 

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