Question

What is mole fraction?

Hint:

Mole fraction is a unitless quantity and represents the ratio of the amount of one component to the total amount of all components.

Answer 1

Step 1: Definition.
Mole fraction is a way to express the concentration of a component in a mixture. It is defined as the ratio of the number of moles of a component to the total number of moles of all components in the mixture. \[ \text{Mole fraction of component} = \frac{\text{Number of moles of component}}{\text{Total number of moles in mixture}} \]
Step 2: Calculation.
For a solution containing two components, A and B, the mole fraction of A, \( X_A \), is given by: \[ X_A = \frac{n_A}{n_A + n_B} \] where \( n_A \) and \( n_B \) are the number of moles of A and B, respectively.