A `5.2` molal aqueous of methyl alcohol, `CH_(3)OH`, is supplied. What is the molefraction of methyl alcohol in the solution ?

Options

A. `0.050`
B. `0.100`
C. `0.190`
D. `0.086`

Answer

D

Explanation

Mole fraction of solute
`=("No. of moles of solute")/("No. of moles of solute + No. of moles of solvent")`
`=(5.2)/(5.2+(100)/(18))=(5.2xx18)/(93.6+1000)=(93.6)/(1093.6)=0.086`