StoichiometryMole Concept and Number of Atoms206Choose the best answerEqual masses of N₂, H₂ and O₂ are present in a vessel. Which sample contains the least number of atoms?AH₂BN₂CO₂DBoth H₂ and N₂ Like 0 Discuss 0Share
StoichiometryFactors Affecting Percentage Yield207Choose the best answerWhich factor does NOT affect the percentage yield of a reaction?ALoss of product during purificationBSide reactions producing unwanted productsCMeasurement errorsDColour of the product Like 0 Discuss 0Share
Sindh MDCAT 2022 Chemistry#Combustion Stoichiometry#Stoichiometry208Choose the best answerQ.101 3.0 g of C on combustion gives C + O₂ → CO₂.A5.5 g of CO₂B22 g of CO₂C6.02 × 10²³ molecules of CO₂D1.505 × 10²³ molecules of CO₂ Like 0 Discuss 0Share
StoichiometryMass–Mass Stoichiometry209Choose the best answer27 g of Al reacts with how much O₂ to produce Al₂O₃? 4Al + 3O₂ → 2Al₂O₃A8 gB16 gC32 gD24 g Like 0 Discuss 0Share
StoichiometryMole#Mole Concept210Choose the best answerWhat is the mass of one gram-molecule of water?A18B18 amuC18 gD18 kg Like 0 Discuss 0Share