StoichiometryMole#Mole Concept66Choose 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
StoichiometryMole Concept and Number of Molecules67Choose the best answerHow many H₂ molecules are present in 0.20 g H₂? Molar mass of H₂ = 2.016 g mol⁻¹A(0.20/2.016) × 6.02 × 10²³B(2.016/0.20) × 6.02 × 10²³C0.20 × 1.008DNone of these Like 0 Discuss 0Share
StoichiometryAvogadro Constant68Choose the best answerNA, the Avogadro constant, is equal to the number of:AAtoms in 1 g HeBElectrons needed to deposit 24.3 g Mg from Mg²⁺CMolecules in 35.5 g Cl₂DAtoms in 24.3 g Mg Like 0 Discuss 0Share
StoichiometryGas Density and Molar Mass69Choose the best answerWhich gas has a mass of approximately 1.16 g per litre at STP (273 K and 1 atm)?AO₂BCOCCH₄DC₂H₂ Like 0 Discuss 0Share
StoichiometryMole Concept and Avogadro Constant70Choose the best answerIf the number of entities defined as one mole were hypothetically changed from 6.02 × 10²³ to 6.02 × 10²⁰, which quantity would change?ADefinition of gramBMass associated with one mole of carbonCStoichiometric ratios in a balanced equationDRatio of elements in a compound Like 0 Discuss 0Share