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March 30, 2017

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A 2.30 m solution of urea (CO(NH2)2; FW= 60.0) in water has a density of 1.14 g/mL. Calculate the percent mass of urea in this solution?

  • Chemistry - ,

    Do you need the density? If that is a small m then it is molality and not molarity and I don't think the density is needed,
    2.30 m = moles/kg solvent
    mols = 2.30
    grams = moles x molar mass = 2.30 x 60 = ??
    Total mass of solution = 1000 g + g urea = xx.
    percent = (grams urea/total mass)*100
    Check my thinking. Check my work.

  • Chemistry - ,

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  • Chemistry - ,

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