StoichiometryMolar Mass271Choose the best answerOne gram-mole of which pair has equal mass?ANO₂ and CO₂BNa and NH₃CCH₄ and O₂DN₂ and CO Like 31 Discuss 1Share1
StoichiometryMass–Volume Stoichiometry272Choose the best answerConsider the reaction: Ca + 2HCl → CaCl₂ + H₂ What volume of H₂ at STP (273 K and 1 atm) is produced when 20 g Ca reacts with excess HCl?A22.4 dm³B11.2 dm³C24.0 dm³D1.12 dm³ Like 0 Discuss 0Share
StoichiometryMass–Volume Relationship273Choose the best answerWhat is the mass of 112 cm³ CH₄ at STP (273 K and 1 atm)?A1.6 gB0.8 gC0.08 gD0.16 g Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Atoms274Choose the best answerUsing Ar(Ar) = 40 and Ar(Ca) = 40, 20 g Ar contains the same number of atoms as:A40 g CaB30 g CaC20 g CaD10 g Ca Like 0 Discuss 0Share
StoichiometryActual Yield and Theoretical Yield275Choose the best answerIn a normal experiment, actual yield is generally:AGreater than theoretical yieldBLess than theoretical yieldCAlways equal to theoretical yieldDUnrelated to theoretical yield Like 0 Discuss 0Share