Stoichiometry Stoichiometry MCQS#Formula Mass56Choose the best answerWhy is the term molecular mass not used for NaCl?ANaCl has a very large mass.BNaCl exists only in the solid state.CNaCl does not exist as discrete molecules; it exists as a lattice of ions.DSodium is a metal. Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Molecules and Compounds57Choose the best answerWhich statement about molecules and compounds is incorrect?AA molecule may contain atoms of the same element.BAn element can exist as molecules.CAll molecules are compounds.DA compound always contains more than one element. Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Pure Substances58Choose the best answerWhich option represents a pure substance?AAirBMilkCSodium chlorideDSoil Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry59Choose the best answerWhat volume of O₂ at STP (273 K and 1 atm) is required to burn 4 g CH₄ completely? CH₄ + 2O₂ → CO₂ + 2H₂OA22.4 LB11.2 LC5.6 LD44.8 L Like 0 Discuss 0Share
StoichiometryMass–Mass Stoichiometry60Choose the best answerHow many grams of O₂ are required to produce 1.8 g H₂O? 2H₂ + O₂ → 2H₂OA32 gB16 gC1.6 gDNone of these Like 0 Discuss 0Share