What volume of hydrogen at STP is needed to convert 2.6 g of ethyne completely into ethane (C = 12, H = 1, molar volume = 22.4 dm³)?
Correct answer C. 4.48 dm³
Explanation
C₂H₂ + 2H₂ → C₂H₆. Moles of ethyne = 2.6/26 = 0.10 mol, requiring 0.20 mol H₂. Volume = 0.20 × 22.4 = 4.48 dm³.
Answer checked How we write and check questions
Discussion