Which of the following terms are unitless? - Vidyadip

MCQ

Which of the following terms are unitless?

A
Molality.
B
Molarity.
✓
Mole fraction.
D
normality

✓

Answer

Correct option: C.

Mole fraction.

Mole fraction,
$\text{x}_\text{A}=\frac{\text{n}_\text{A}}{\text{n}_\text{A}+\text{n}_\text{B}}=\frac{\text{Mole of component}}{\text{Total number of moles}}\text{(unitless)}$
Mass percentage $\frac{\text{Mass of component}}{\text{Total mass}}\times100\text{(unitless)}$

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