0.90g of a non-electolyte was dissolved in 87.9 g of benzene. This reised the boiling point of benzene by `0.25^(@)C`. If the molecular mass of the non-electrolyte is 103.0 g `mol^(-1)` , calculate the molal elecation constant for benzene.

Explanation

To calculate the molal elevation constant (Kb) for benzene, we can follow these steps:

### Step 1: Gather the given data
- Mass of the non-electrolyte (solute), \( W_b = 0.90 \, \text{g} \)
- Mass of benzene (solvent), \( W_a = 87.9 \, \text{g} \)
- Elevation in boiling point, \( \Delta T_b = 0.25 \, ^\circ C \) (which is equivalent to 0.25 K)
- Molecular mass of the non-electrolyte, \( M_b = 103.0 \, \text{g/mol} \)

...