StoichiometryMass–Volume Stoichiometry31Choose 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 Ratios32Choose 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
StoichiometryMole Concept and Number of Molecules33Choose the best answerWhich sample contains the greatest number of molecules?A2 mol H₂B4 mol CH₄C6 mol SO₂D10 mol O₂ Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Physical Change34Choose the best answerIdentify the physical change among the following.ARusting of ironBBurning magnesium ribbonCBurning a candleDMelting wax Like 0 Discuss 0Share
StoichiometryMole Concept and Electron Stoichiometry35Choose the best answerWhat mass of Ca releases the same number of valence electrons as 23 g Na?A40 gB20 gC30 gD50 g Like 0 Discuss 0Share