Question

Mole fraction of urea in a solvent is 0.1 .if molarity of this solution is 10/9m then molar mass of solvent (in g/mol)

Answer 1

Hey Dear,

◆ Answer -

M1 = 100 g/mol

◆ Explaination -

# Given -

X2 = 0.1

m = 10/9 m

# Solution -

Mole fraction of solvent will be -

X1 = 1 - X2

X1 = 1 - 0.1

X1 = 0.9

Molality of the solution is related to mole fraction of the solution as -

m = 1000.X2 / X1.M1

10/9 = (1000 × 0.1) / (0.9 × M1)

M1 = (1000 × 0.1 × 9) / (0.9 × 10)

M1 = 100 g/mol

Therefore, molar mass of solvent is 100 g/mol.

Hope this helps you.

Answer 2

$<marquee>Ello ♥️<marquee>$

☆ Molality (m) is defined as the number of moles of solute per kilogram of solvent.

☆ Molarity is a measurement of the moles in the total volume of the solution, whereas molality is a measurement of the moles in relationship to the mass of the solvent.