Chapter 13.3, Problem 1P

What are mass and mole fractions?

To determine

The mass and mole fractions.

Explanation of Solution

The mass fraction refers to the mass of a substance divided by the total mass of the mixture. It is represented as follows:

${\text{mf}}_i=\frac{m_i}{m_m}$

Here, the substance is i, the mass of the mixture is $m_m$ and mass of a substance i is $m_i$.

The mole fraction refers to the mole number of a substance divided by the total number of moles of the mixture. It is represented as follows:

$y_i=\frac{N_i}{N_m}$

Here, the mole of the mixture is $N_m$ and mole of a substance i is $N_i$.