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Posted by on Wednesday, February 10, 2010 at 12:14am.

200. g of a solvent is available, how many grams of a solute should be weighed out to make a 15.0% solution by mass?

  • Chemistry - , Wednesday, February 10, 2010 at 12:27am

    What's the definition of mass percent?
    % = (mass solute/100 g solution)*100.
    mass solute = x
    mass solution = 200 g solvent + x g solute = 200+x
    Substitute and solve for x.
    (x/x+200)*100 = 15
    x=??

  • Chemistry - , Wednesday, February 10, 2010 at 1:01am

    still not making sense because answers are
    a. 30.0
    b. 35.3
    c. 15.0
    d. 28.9

  • Chemistry - , Wednesday, February 10, 2010 at 12:32pm

    Then you made a math error because the correct answer is listed.

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