StoichiometryMole–Mass Stoichiometry51Choose the best answerWhat mass of MgO is produced when 0.5 mol Mg burns in excess O₂? 2Mg + O₂ → 2MgOA40 gB30 gC10 gD20 g Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry52Choose the best answerHow many litres of H₂ at STP are produced when 6.0 g Mg reacts with excess HCl? Mg + 2HCl → MgCl₂ + H₂A22.4 LB11.2 LC5.6 LDNone of these Like 0 Discuss 0Share
StoichiometryMass–Mass Stoichiometry53Choose 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
StoichiometryGas Volume and Mass Stoichiometry54Choose the best answerIn the reaction: 2NO + O₂ → 2NO₂ 560 cm³ NO₂ is produced at STP (273 K and 1 atm), while 50 mg O₂ remains unused. What were the initial masses of NO and O₂?A0.6 g NO and 0.4 g O₂B0.75 g NO and 0.45 g O₂C6.0 g NO and 4.5 g O₂D0.3 g NO and 0.37 g O₂ Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry55Choose the best answerWhat volume of O₂ at STP (273 K and 1 atm) is required to burn 16 g sulfur, and what volume of SO₂ is produced? S + O₂ → SO₂A11.2 L and 22.4 LB22.4 L and 44.8 LC44.8 L and 22.4 LD11.2 L and 11.2 L Like 0 Discuss 0Share