From two identical holes, nitrogen and an unknown gas are leaked into a common vessel of `3 L` capacity for `10 min`, at `27^(@)C`. The resulting pressure is `4.18` bar and the mixture contains `0.4 mol` of nitrogen. What is the molar mass of the unknown gas?

Explanation

To find the molar mass of the unknown gas, we will follow these steps:

### Step 1: Write down the given data
- Volume of the vessel (V) = 3 L
- Resulting pressure (P) = 4.18 bar
- Number of moles of nitrogen (N₂) = 0.4 mol
- Temperature (T) = 27°C = 300 K (converted to Kelvin by adding 273)
- Time = 10 minutes
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