0.14 g of a substance on evaporation by Victor Meyer's method, displaced 36 mL of air over water at `20^@ `C and 750 mm Hg. Calculate the molecular mass of the substance. (Aqueous tension at `20^@ C` = 17.4 mm)

Explanation

To calculate the molecular mass of the substance using Victor Meyer's method, we can follow these steps:

### Step 1: Identify the Given Data
- Mass of the substance (m) = 0.14 g
- Volume of air displaced (V1) = 36 mL
- Temperature (T1) = 20°C = 293 K (20 + 273)
- Total pressure (P_total) = 750 mm Hg
- Aqueous tension at 20°C = 17.4 mm Hg
...