StoichiometryMole Concept181Choose the best answerThe amount of substance containing NA specified entities is called:AOne moleBAvogadro constantCMolecular massDFormula mass Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Mole Concept182Choose the best answerFor which substance are molecular mass and formula mass numerically the same?A56 amu CaCO₃B40 g MgOC17 amu NH₃DA and B Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Molecules183Choose the best answer4.6 g C₂H₅OH and 3.0 g C₂H₆ contain:ADifferent numbers of moleculesBDifferent masses of carbonCEqual numbers of moleculesD0.2 mol oxygen atoms in each Like 0 Discuss 0Share
StoichiometryMolar Volume at STP184Choose the best answerWhat volume is occupied by 1 g O₂ at STP?A22.414 dm³B0.70 dm³C22414 cm³D0.22414 m³ Like 0 Discuss 0Share
StoichiometryMole–Mole Stoichiometry185Choose the best answerHow many moles of O₂ are formed by complete decomposition of 1 mol KClO₃? 2KClO₃ → 2KCl + 3O₂A3 molB2/3 molC3/2 molD2 mol Like 0 Discuss 0Share