In Dumas method 292 mg of an organic compound released 50 mL of nitrogen gas (N2) at 300 K temperature and 715 mm Hg pressure. The percentage composition of ‘N’ in the organic compound is _______% [Ne

Question

In Dumas method 292 mg of an organic compound released 50 mL of nitrogen gas (N2) 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)

Prashant Kotian · Accepted Answer

Correct answer: .. Actual pressure = 715 – 15 = 700 Volume of N2 at STP = 300 700    = 41.90 ml 50 ml of N2 weights = 90 . 28 = 0.0523 %N2 = . 0523 . × 100 = 17.93 » 18%

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