chemistry

calculate the molecular weight of a substance which freezes forms a 7.00% by mass solution in water which freezes at -0.89°C.

  1. 👍 0
  2. 👎 0
  3. 👁 36
asked by iain
  1. See above problem with C6H6.

    1. 👍 0
    2. 👎 0
    posted by DrBob222

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    Confused on these, please explain or show work for the answer if you can. :) 1. What is the morality of a water solution that freezes at -0.633°C? 2. What is the freezing point of a solution that contains 1.99 g of a molecular

    asked by Lauren on December 6, 2017
  2. chemistry

    Two solutions are prepared. In Solution A, 5.0 g of a substance of molecular weight 50 is dissolved in 100 mL of pure water. In Solution B, 5.0 g of a substance with molecular weight of 75 is dissolved in 100 mL of pure water. The

    asked by Anonymous on February 25, 2009
  3. CHEMISTRY

    You mix 40.0 g of ethanol (C2H5OH, molecular weight = 46.1 g/mol) and 60.0 g of water (molecular weight = 18.0 g/mol) The resulting solution has a density of 920 g/L. a)Calculate the molarity of ethanol in this solution? Answer :

    asked by Jen on March 18, 2012
  4. chemistry

    If you have 12 moles of a substance, how many molecules do you have of that substance? Suppose the substance has a molecular weight of 342. How many grams of that substance would you have to dissolve in a liter of water to make a

    asked by VANESSA on September 3, 2011
  5. Are these correct?

    A) How do you make 200 mL of a 0.1 M solution of a substance that has a molecular weight of 121.1 g/mol? Answer I got: 200mL = 1/0.1M x 1/(121.1g/mol) x mass of the substance. mass of the substance = 0.2L x 0.1M x 121.1g/mol=2.42g

    asked by Anonymous on February 1, 2008
  6. chemistry

    Suppose a substance has been prepared that is composed of carbon, hydrogen, and nitrogen. When 0.1156 gram of this compound is reacted with oxygen, 0.1638 gram of carbon dioxide (CO2) and 0.1676 gram of water (H2O) are collected.

    asked by Chansa on June 3, 2016
  7. chemistry

    what mass in grams of a molecular substance (mole weight=50.0g/mol) must be added to 500g of water to produce a solution that boils at 101.56(degrees)C?

    asked by jimbo on June 26, 2010
  8. college chemistry

    A 1.875 g sample of pyrazine was dissolved in 25.00g of water, producing a solution that freezes at -1.55 C. Assume the solution behaves ideally. Kf(H2O)=1.86 C/molality. What is the experimental molecular weight of pyrazine?

    asked by Anonymous on February 3, 2011
  9. Physiology

    Suppose a salt and a glucose solution are separated by a membrane that is permeable to water but not to the solutes. The NaCl solution has a concentration of 1.95 g per 250 mL (molecular weight = 58.5). The glucose solution has a

    asked by ivy on May 14, 2011
  10. chemistry

    what is the molarity of 40g in 0.5L of solution. Molecular weight of substance is 100.09g/mole.

    asked by carla on March 10, 2011

More Similar Questions