In Dumas’ method for estimation of nitrogen, 0.3g of an organic compound gave 50mL of nitrogen collected at 300K temperature and 715mm pressure. Calculate the percentage composition of nitrogen in the compound. (Aqueous tension at 300K=15 mm)

Explanation

To solve the problem of estimating the percentage composition of nitrogen in the organic compound using Dumas' method, we will follow these steps:

### Step 1: Adjust the Pressure for Aqueous Tension
First, we need to account for the aqueous tension at the given temperature (300 K). The total pressure given is 715 mm, and the aqueous tension is 15 mm. Therefore, the pressure of the nitrogen gas can be calculated as follows:

\[ P_{\text{N}_2} = P_{\text{total}} - P_{\text{aqueous}} = 715 \, \text{mm} - 15 \, \text{mm} = 700 \, \text{mm} \]
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