What is the mole fraction of solute in a 3.63 m aqueous solution? - g?

3.63 m (molal) aqueous solution means that 3.63 moles of particular solute is dissolved in 1 Kg (1000 g) of water (solvent).

So,

The concentration of Solute = 3.63 moles

Moles of water are calculated by using following formula,

Moles = mass / M. mass

mass of water = 1000g

M. mass of water = 18.01 g/mol

Putting the values,

Moles = 1000 g / 18.01 g/mol

Moles = 55.524 mol

Now, having both, moles of solute and moles of solvent we can calculate mole fraction by applying following formula,

Mole Fraction = Moles of Solute : (moles of solute + moles of solvent)

Putting values,

Mole Fraction = 3.63 mol : (3.63 mol + 55.524 mol)

Mole Fraction = 3.63 mol : 59.154 mol

Mole Fraction = 0.0614