A 5-L vessel contains 1.4 g of nitrogen. When heated to 1800 K, 30% of molecules are dissociated into atoms. Calculate the pressure of the gas at 1800 K.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Calculate the number of moles of nitrogen (N₂)
Given mass of nitrogen = 1.4 g
Molar mass of nitrogen (N₂) = 28 g/mol

Number of moles (n) = mass (g) / molar mass (g/mol)
\[ n = \frac{1.4 \, \text{g}}{28 \, \text{g/mol}} = 0.05 \, \text{mol} \]
...