posted by cc on .
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?
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.
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