Question

What is the mole fraction of urea, CO(NH2)2, in a solution prepared by dissolving 6.6 g of urea in 30.2 g of methanol, CH3OH?

Answer 1

molar mass urea = 60

molar mass methanol = 32
mols urea = 6.6/60 = 0,11
mols methanol = 30.2/32 = 0.944
Total mols = 0.11 + 0.944 = 1.054
Xurea = moles urea/total moles = ?
Xmethanol = mols methanol/total moles - ?
Check my arithmetic.