A gas is filled in a container at certain temperature and pressure. At the same temperature more gas is filled in the vessel. Calculate the percentage increase in the mass of the gas. If the ratio of initial and final pressure is 1:2.

Explanation

To solve the problem of calculating the percentage increase in the mass of the gas when more gas is added to a container at constant temperature and the pressure ratio changes from 1:2, we can follow these steps:

### Step 1: Understand the Initial Conditions
Let:
- \( P_1 \) = Initial pressure
- \( P_2 \) = Final pressure
- \( V \) = Volume of the container (constant)
- \( T \) = Temperature (constant)
...