Stoichiometry 11#Ionic Compounds221Choose the best answerWhy is formula mass used for NaCl instead of molecular mass?ANaCl has a very high massBNaCl exists only in the solid stateCNaCl forms an ionic lattice instead of separate moleculesDSodium is a metal Like 0 Discuss 0Share
StoichiometryAvogadro's Law222Choose the best answerWhich pair contains equal numbers of molecules?A1 g H₂ and 44 g CO₂B1 dm³ O₂ and 1 dm³ N₂ at the same temperature and pressureC1 mol H₂ and 0.5 mol HeDAll of these Like 0 Discuss 0Share
StoichiometryMolar Volume at STP223Choose the best answer22.4 L H₂O vapour at STP (273 K and 1 atm) is condensed. If the density of liquid water is 1.0 g mL⁻¹, what volume of liquid water is obtained?A18 LB1 LC1 mLD18 mL Like 0 Discuss 0Share
StoichiometryMolar Volume and Number of Molecules224Choose 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
StoichiometryCombustion analysis225Choose the best answerWhich reagent absorbs CO₂ during combustion analysis?ALiOHB50% NaOHC50% KOHD95% KOH Like 0 Discuss 0Share