posted by DD

The density of methanol is .7918 g/ml/ How many grams of methanol do I have to add to 35.0ml of water to make a solution containing 25% methanol?

  1. DrBob222

    Is that mass percent?
    You want
    [x grams MeOH/(x g MeOH + 35g H2O)] = 0.25
    Solve for x = grams methanol.
    Then mass = volume x density. Substitute mass and density and solve for volume.
    Post your work if you get stuck.

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