In Dumas' method 292 mg of an organic compound released 50 mL of nitrogen gas () at 300 K temperature and 715 mm Hg pressure. The percentage composition of 'N' in the organic compound is % (Nearest i

Question

In Dumas' method 292 mg of an organic compound released 50 mL of nitrogen gas () at 300 K temperature and 715 mm Hg pressure. The percentage composition of 'N' in the organic compound is  % (Nearest integer)

(Aqueous tension at 300 K = 15 mm Hg)

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Strategy:
 In Nitrogen estimation by Dumas method, use the Ideal Gas Law to find the moles of  produced. Correct the total pressure by subtracting the aqueous tension to obtain the pressure of dry Nitrogen.

Step 1: Correct Pressure

Step 2: Calculate moles of product
Using  (, ):

Step 3: Calculate percentage
Mass of .

Nearest integer is 18.

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