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 in carbon tetrachloride, follow these steps:

### Step 1: Define the Mass of the Solution
Assume we have 100 grams of the solution for simplicity.

### Step 2: Calculate the Mass of Benzene and Carbon Tetrachloride
Since the solution is 30% benzene by mass:
- Mass of benzene = 30% of 100 g = 30 g
...