StoichiometryMolar Mass of Gas Mixtures196Choose the best answerAn equimolar gaseous mixture of CH₄ and C₂H₆ occupies 22.4 dm³ at STP. What is its mass?A4.6 gB1.6 gC2.3 gD23 g Like 0 Discuss 0Share
StoichiometryAvogadro's Law197Choose the best answerWhich gaseous samples occupy the same volume at the same temperature and pressure?A1 mol CO and 1 mol N₂B1 mol O₂ and 1 mol N₂C1 mol CO and 1 mol CO₂DAll of these Like 0 Discuss 0Share
StoichiometryPercentage Yield198Choose the best answerIn an experiment, 4 mol H₂O are decomposed and 2 mol H₂ are actually obtained: 2H₂O → 2H₂ + O₂ What is the percentage yield of H₂?A25%B50%C75%D100% Like 0 Discuss 0Share
StoichiometryMass–Mass Stoichiometry199Choose the best answerWhat mass of O₂ is required to convert 1.35 g Al completely into Al₂O₃? 4Al + 3O₂ → 2Al₂O₃A9.6 gB4.8 gC2.4 gD1.2 g Like 0 Discuss 0Share
StoichiometryMolar Mass from Gas Volume200Choose the best answerAt STP (273 K and 1 atm), 5.6 L of a gas has a mass of 8 g. Its molar mass is:A32 g mol⁻¹B16 g mol⁻¹C8 g mol⁻¹D4 g mol⁻¹ Like 0 Discuss 0Share