StoichiometryMass–Mass Stoichiometry231Choose the best answerWhat mass of CaCO₃ is required to produce 2.8 g CaO? CaCO₃ → CaO + CO₂A2.5 gB5.0 gC10 gD50 g Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry232Choose the best answerOne gram of carbon is completely burnt in excess O₂: C + O₂ → CO₂ What volume of CO₂ is produced at STP (273 K and 1 atm)?A1 dm³B22.4 dm³C12 × 22.4 dm³D22.4/12 dm³ Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Atoms233Choose the best answer0.5 mol H₂O contains:A0.5 mol H atomsB22.4 dm³ OCNA H atomsD2 mol atoms Like 0 Discuss 0Share
StoichiometryGas Volume Stoichiometry234Choose the best answerHow many litres of HCl are produced when 100 L H₂ reacts with excess Cl₂ at the same temperature and pressure? H₂ + Cl₂ → 2HClA50 LB100 LC150 LD200 L Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Electrons235Choose the best answerWhat is the total number of electrons present in 1.6 g CH₄?A6.022 × 10²³B1.6 × 10²³C1.6 × 10²²D6.022 × 10²² Like 0 Discuss 0Share