Calculate the mass of a non-volatile solute ( molecular mass `40`) which should be dissolved in `114 g` octane to reduce its vapour pressure to `80%`.

Explanation

To solve the problem of calculating the mass of a non-volatile solute that should be dissolved in 114 g of octane to reduce its vapor pressure to 80%, we can follow these steps:

### Step 1: Understand the Problem
We need to find the mass of a non-volatile solute with a molecular mass of 40 g/mol that, when dissolved in 114 g of octane, reduces the vapor pressure of the solution to 80% of the original vapor pressure of pure octane.

### Step 2: Identify the Given Values
- Molecular mass of the solute (M₂) = 40 g/mol
- Mass of octane (solvent) (m₁) = 114 g
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