2 litres of nitrogen completely react with 6 litres of hydrogen under suitable conditions to form 4 litres of `NH_3`. If all the volumes are measured at the same temperature and pressure, show that the data given are in accordance to the Gay Lussac's law of combining volumes.

Explanation

To show that the given data is in accordance with Gay-Lussac's law of combining volumes, we will analyze the reaction and the volumes of gases involved step by step.

### Step 1: Write the balanced chemical equation
The reaction between nitrogen (N₂) and hydrogen (H₂) to form ammonia (NH₃) can be represented by the balanced equation:
\[ \text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3 \]

### Step 2: Identify the volumes of gases involved
From the question, we have the following volumes:
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