StoichiometryMole Concept and Number of Particles21Choose the best answerWhich statement is correct?A1 g H₂ and 16 g CH₄ contain equal numbers of moleculesB1 g C and 2 g Mg contain approximately equal numbers of atomsC1 mol O₂ and 1 mol He contain equal numbers of atomsDAll of these Like 0 Discuss 0Share
StoichiometryMolar Volume and Number of Molecules22Choose the best answerHow many molecules are present in 56 dm³ O₂ at STP (273 K and 1 atm)?A6.02 × 10²³B3.01 × 10²³C1.505 × 10²³D1.505 × 10²⁴ Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Atoms23Choose the best answerThe number of oxygen atoms present in 49 g H₂SO₄ is:A0.5NABNAC2NAD4NA Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry24Choose the best answerIn the reaction: 2Na + 2H₂O → 2NaOH + H₂ what volume of H₂ at STP (273 K and 1 atm) is produced by 23 g Na?A11.2 dm³B2.44 dm³C10.60 dm³D44.8 dm³ Like 0 Discuss 0Share
StoichiometryStoichiometric Equivalents and Mole Ratios25Choose 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