StoichiometryStoichiometric Equivalents and Mole Ratios41Choose the best answerFor the reaction: CO₂ + C → 2CO which equivalence is NOT correct?A1 mol CO₂ ≡ 2 mol COB1 mol C ≡ 56 g COC44 g CO₂ ≡ 28 g COD44 g CO₂ ≡ 12 g C Like 0 Discuss 0Share
StoichiometryPercentage Yield42Choose 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
Fundamental Concepts of ChemistryChanges of State43Choose the best answerSolid → Liquid → Gas represents which sequence of physical changes?AFreezing → BoilingBMelting → BoilingCSublimation → DepositionDMelting → Freezing Like 0 Discuss 0Share
StoichiometryLimiting Reagent and Mole–Mole Stoichiometry44Choose the best answerFor the reaction: A + 2B → C 5 mol A and 8 mol B will produce:A5 mol CB4 mol CC8 mol CD13 mol C Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry45Choose the best answerWhat volume of CO₂ at STP (273 K and 1 atm) is produced by complete combustion of 7 g C₂H₄? C₂H₄ + 3O₂ → 2CO₂ + 2H₂OA44.8 dm³B22.4 dm³C11.2 dm³D5.6 dm³ Like 0 Discuss 0Share