What is the mass of glucose `(C_(6) H_(12) O _(6))` in it one litre solution which is isotonic with `6 gL ^(-1)` of urea `(NH_(2) CONH_(2))` ?

Explanation

Osmotic pressure of urea solution `(pi_(1)) = CRT`
`= (W_(2))/(M _(2) V) RT = (6)/( 60 xx 1) xx RT`
Osmotic pressure of glucose solution
`(pi _(2)) = (W_(2))/(180 xx 1) xx RT`
For isotonic solution, `pi _(1) = pi_(2)`
`(6)/(60) RT= (W_(2))/(180) RT implies W_(2) = (6)/(60) xx 180`
`W_(2) = 18g`