Calculate the mole fraction of benzene in solution containing 30% by mass in carbon tetrachloride.

Explanation

To calculate the mole fraction of benzene in a solution containing 30% by mass of benzene in carbon tetrachloride (CCl₄), we can follow these steps:

### Step 1: Assume the mass of the solution
Let's assume the total mass of the solution is 100 grams. This assumption simplifies our calculations.

### Step 2: Calculate the mass of benzene
Since the solution contains 30% benzene by mass, we can calculate the mass of benzene:
\[
...