StoichiometryMolar Mass of Gas Mixtures231Choose the best answerAn equimolar gaseous mixture of CH₄ and C₂H₆ occupies 22.4 dm³ at STP. What is its mass?A4.6 gB1.6 gC2.3 gD23 g Like 0 Discuss 0Share
StoichiometryMass–Volume Relationship232Choose the best answerWhat volume is occupied by 4.4 g CO₂ at STP (273 K and 1 atm)?A22.4 cm³B224 cm³C2240 cm³D22400 cm³ Like 0 Discuss 0Share
StoichiometryAvogadro's Law233Choose the best answerWhich gaseous samples occupy the same volume at the same temperature and pressure?A1 mol CO and 1 mol N₂B1 mol O₂ and 1 mol N₂C1 mol CO and 1 mol CO₂DAll of these Like 0 Discuss 0Share
StoichiometryAvogadro Constant234Choose 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
StoichiometryPercentage Composition by Mass235Choose the best answerWhat is the percentage of carbon by mass in CaCO₃?A6%B12%C40%D48% Like 0 Discuss 0Share