JEE MainChemistryGeneral Organic Chemistry
An organic compound weighing 0.25 g is subjected to the Dumas method for the estimation of nitrogen. If the percentage of nitrogen in the compound is 28 % , what is the volume of N ₂ gas evolved at STP in mL ? (Given: Molar mass of N ₂ is 28 g mol ⁻¹ , Molar volume of N ₂ at STP is 22400 mL )
Correct answer
56
Step-by-step solution
Mass of nitrogen present in the organic compound is: Mass of N = 28 100 0.25 g = 0.07 g Moles of N ₂ gas evolved: n = 0.07 28 = 0.0025 mol Volume of N ₂ gas at STP: V = n 22400 mL = 0.0025 22400 mL = 56 mL Answer: 56