Anonymous
Anonymous asked in Science & MathematicsChemistry · 1 decade ago

aa solution of toluene(92.1 weight) in benzene(molecular weight 78.1) is prepared the mole fraction of toluene

in the solution is .100. what is the molality of the solution?

A. .100 m

B. .703m

c. .921 m

D. 1.28 m

E. 1.42 m

8 Answers

Relevance
  • 1 decade ago
    Favorite Answer

    Since the Mole Fraction of Toluene is 0.1 the mole fraction of benzene should be 0.9.

    they should be proportionate.assume the total number of moles to be equal to 1.

    Molality = No of moles of solute/ Wt of Solvent in K.G

    No of moles of Solute(toulene)=0.1

    Wt of Solvent(Benzene) =0.9*78(in grams) or 0.9*78/1000(in K.G)

    Substituting the values in given equation we get molality of the solution as 1.42m

    therefore the correct answer is E

  • finnen
    Lv 4
    4 years ago

    Benzene Molecular Weight

  • Anonymous
    6 years ago

    This Site Might Help You.

    RE:

    Aa solution of toluene(92.1 weight) in benzene(molecular weight 78.1) is prepared the mole fraction of toluene

    in the solution is .100. what is the molality of the solutio

    Source(s): aa solution toluene921 weight benzenemolecular weight 781 prepared mole fraction toluene: https://knowledge.im/?s=aa+solution+toluene921+wei...
  • Erika
    Lv 4
    4 years ago

    Toluene Molecular Weight

  • How do you think about the answers? You can sign in to vote the answer.
  • Anonymous
    4 years ago

    Remove Your Moles, Warts & Skin Tags in 3 Days

    Easily, Naturally And Without Surgery

  • Anonymous
    6 years ago

    You can start losing weight steadily and quickly by cutting your calorie intake down by around 350-500 a day and drink plenty of water, eat healthily. Also breaking down your meals into multiple snacks can help speed up the metabolism meaning you will burn calories quicker and digest food quicker. By cutting down portions and being healthy you could loose a couple of pounds within a fortnight. Which isn't amazing but you are more likely to keep it off and get used to eating less meaning you can carry on your weight loss to further lengths.

  • Anonymous
    6 years ago

    Lots of things can help lose weight, a good nights sleep, exercise, not eating too much junk food, eating sensible amounts of fruit and vegetables, and yes green tea may help do it's bit by assisting your bowel movement. Get more information here:

  • 5 years ago

    0.1 mol solute/0.1+0.9, so 0.9 mol solvent x78.1 g/1000 g= 0.07 kg solvent molality=mol solute/kg solvent

    so 0.1 mol solute/0.07 kg solvent = 1.428 m

Still have questions? Get your answers by asking now.