A solution of urea (molecular mass = 60) contains 8.6 g per litre. It is isotonic with a 5% solution of a non-volatile and non-electrolytic solute. What will be the molecular mass of the solute?
A
`34.9 "g mol"^(-1)`
B
`349 "g mol"^(-1)`
C
`861"g mol"^(-1)`
D
`3490 "g mol"^(-1)`
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