Which of the following terms are unitless?

Options

A. Molality
B. Molarity
C. Mole fraction
D. Normality

Explanation

Both moel fraction and mass per cent are unitless as b oth are ratios of moles and mass respectively.
Mole fraction `=("Nuumber of moles of solute")/("Number of moles of solution")=("moles")/("moles")`
`=("Number of moles of solvent")/("Number of moles of Solution")=("moles")/("moles")`
`"Mass per cent"=("Mass of soulte in gram")/("Mass of solution in gram")xx100`