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Practice question

MCQ

Question

In the Dumas method, 0.35 g of a compound gave 90 mL of N₂ at STP, and in Carius method, 0.35 g gave 0.574 g of AgBr. What is the percentage of nitrogen?

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Explanation

Mass of N = (28/22400) × 90 = 0.1125 g. Percentage = (0.1125/0.35) × 100 = 32.14% ≈ 32%. Carius data is for bromine, not relevant here.

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