Equal volumes of two gases `A` and `B` diffuse through a porous pot in 20 and 10 seconds respectively if the molar mass of `A` be 80 find the molar mass of `B` .

Explanation

To solve the problem of finding the molar mass of gas B using Graham's law of diffusion, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Given Information:**
- Molar mass of gas A (M_A) = 80 g/mol
- Time taken for gas A to diffuse (t_A) = 20 seconds
- Time taken for gas B to diffuse (t_B) = 10 seconds
...