Calculate the mole fraction in 2.5 m aqueous solution .

Answer

0.043

Explanation

2.5 m aqueous solution means that 2.5 moles of the solute are dissolved in 1000 g of water.
`"No. of moles of water in 1000 g" =("Mass of water")/("Gram molar mass")=((1000g))/((18"g mol"^(-1)))=55.5 mol`
`"Mole fraction of solute"=("No. of moles of solute")/("No. of moles of solute + No. of moles of water")`
`((2.5 mol))/((2.5 mol+55.5 mol))=((2.5 mol))/((58 mol))=0.043`.