chem

density of 20% by mass C2H6O2 solution in water is 1.03 g/mL. find the molarity of the solution.

  1. 👍 0
  2. 👎 0
  3. 👁 161
asked by lily
  1. 20% by mass means 20 g C2H6O2 in 100 g soln.
    moles C2H6O2 = 20/molar mass.
    100 g soln. Use density to convert to L, then
    M = moles/L

    1. 👍 0
    2. 👎 0
  2. can i know ur answer bcus i got diff. from the actual ans,3.32M but i get 63.93 M.
    if im wrong could you show me the conversion value to L (0.9709L) and the moles (62.07 mol).(is my calculation)

    1. 👍 0
    2. 👎 0
    posted by lily
  3. 62.07 is the molar mass, not the moles.
    moles = 20.0g/molar mass = ??
    100 mL/1.03 g/mL is 97.09 mL which is 0.09709 L.

    1. 👍 0
    2. 👎 0
  4. thanks...

    1. 👍 0
    2. 👎 0
    posted by lily

Respond to this Question

First Name

Your Response

Similar Questions

  1. CHemistry....Please double check DrBobb

    What mass of ethylene glycol C2H6O2, the main component of antifreeze, must be added to 10.0 L water to produce a solution for use in a car's radiator that freezes at -23C? Assume density for water is exactly 1g/mL. First we find

    asked by Saira on January 24, 2009
  2. Chemistry

    Chemistry - Danielle , Wednesday, February 11, 2009 at 7:24pm The density of a 22.0% by mass ethylene glycol (C2H6O2) solution in water is 1.03 g/mL. Find the molarity of the solution. Answer in M

    asked by Danielle on February 11, 2009
  3. CHemistry....Please help

    What mass of ethylene glycol C2H6O2, the main component of antifreeze, must be added to 10.0 L water to produce a solution for use in a car's radiator that freezes at -23C? Assume density for water is exactly 1g/mL.

    asked by Saira on January 22, 2009
  4. 12th grade

    A perchloric acid solution is composed of 168.75 g of perchloric acid and 81.25 mL of pure water. What is the percent by mass of the perchloric acid solution? The density of water is 1.000 g/mL. When I did this part I got 67.5%

    asked by Helpplease on October 24, 2010
  5. Ap Chemistry

    A perchloric acid solution is composed of 168.75 g of perchloric acid and 81.25 mL of pure water. What is the percent by mass of the perchloric acid solution? The density of water is 1.000 g/mL. When I did this part I got 67.5%

    asked by Helpplease on October 24, 2010
  6. College Chemestry

    an agueous solution of ethlylene glycol (C2H6O2) is 40% ethylene glycol by mass, and has a density of 1.05g/ml. What are the molarity, molality, and mole fraction of the solution? Do you know how to solve this...I am kinda

    asked by Gary on October 26, 2008
  7. Science

    I need to calcuted the molarity from this 12.5 g of ethylene glycol antifreeze dissolved in o.100kg of water. Density of solution is 1.0 g/mL I know molarity if mole of solute / L of solution. I am confused on how to find the L of

    asked by K on February 15, 2013
  8. Chem

    I need to calcuted the molarity from this 12.5 g of ethylene glycol antifreeze dissolved in o.100kg of water. Density of solution is 1.0 g/mL I know molarity if mole of solute / L of solution. I am confused on how to find the L of

    asked by Please please helppppp!!!!! on February 15, 2013
  9. chemistry

    I need help solving this question.. An aqueous solution of ethylene glycol (C2H6O2) IS 40% ethylene glycol by mass, and has a density of 1.05g/ml. what are the molarity, molality fraction of the solution?

    asked by Linda on July 7, 2010
  10. Chemistry

    An aqueous antifreeze solution is 40.0% ethylene glycol (C2H6O2) by mass. The density of the solution is 1.05 g/cm3. Calculate the molality, molarity, and mole fraction of the ethylene glycol.

    asked by Sarah on January 21, 2011

More Similar Questions