StoichiometryGas Volume Stoichiometry91Choose the best answer100 mL each of C₂H₂ and O₂ are ignited at the same temperature and pressure: 2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O Assuming H₂O remains as vapour, the final gaseous mixture contains:A10 mL C₂H₂, 50 mL O₂, 40 mL CO₂ and 20 mL H₂OB5 mL O₂, 30 mL CO₂ and 15 mL H₂OC20 mL C₂H₂, 80 mL CO₂ and 40 mL H₂OD60 mL C₂H₂, 80 mL CO₂ and 40 mL H₂O Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry92Choose the best answerWhat volume of O₂ at STP (273 K and 1 atm) is required for complete combustion of 96 g CH₄? CH₄ + 2O₂ → CO₂ + 2H₂OA89.6 dm³B134.4 dm³C268.8 dm³D336.0 dm³ Like 0 Discuss 0Share
BasicsStoichiometry #Mole Concept93Choose the best answerWhich statement correctly describes the particles present in 1 mole of CaCO₃?A6.02 × 10²³ molecules of CaCO₃B6.02 × 10²³ formula units of CaCO₃C6.02 × 10²³ Ca atoms onlyD6.02 × 10²³ g of CaCO₃ Like 0 Discuss 0Share
BasicsStoichiometry #Mole Concept94Choose the best answerWhich statement is true for 1 mol of O₂ and 1 mol of CO₂?AThey have the same massBThey contain the same number of moleculesCThey contain the same total number of atomsDThey contain the same number of electrons Like 0 Discuss 0Share
BasicsStoichiometry #Avogadro's Number95Choose the best answerHow many electrons are present in one mole of electrons?A1 electronB6.02 × 10²³ coulombsC6.02 × 10²³ electronsD1 gram of electrons Like 0 Discuss 0Share