StoichiometryPercentage Yield141Choose the best answerIn an experiment, 4 mol H₂O are decomposed and 2 mol H₂ are actually obtained: 2H₂O → 2H₂ + O₂ What is the percentage yield of H₂?A25%B50%C75%D100% Like 0 Discuss 0Share
StoichiometryMole Concept142Choose the best answerWhich statement is incorrect?AMass of 1 mol Cl₂ = 35.5 gB1 mol H₂ contains 6.022 × 10²³ moleculesC23 g Na and 24 g Mg contain approximately equal numbers of atomsD1 mol ideal O₂ occupies about 22.4 dm³ at 273 K and 1 atm Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Electrons143Choose the best answerThe number of electrons present in 0.1 mol CH₄ is:A10NAB5NACNAD0.1NA Like 0 Discuss 0Share
StoichiometryStoichiometric Coefficients and Mole Ratios144Choose the best answerThe balanced equation: N₂ + 3H₂ → 2NH₃ correctly represents that:A14 g N₂ are formedB3 mol H₂ are formedC2 mol NH₃ are reactingD6 g H₂ react to form 34 g NH₃ Like 0 Discuss 0Share
StoichiometryMole#Mole Concept145Choose the best answerWhat is the formula mass of an ionic compound called when expressed in grams?AGram atomic massBMolecular massCRelative atomic massDGram formula mass Like 0 Discuss 0Share