StoichiometryMolar Mass366Choose the best answerOne gram-mole of which pair has equal mass?ANO₂ and CO₂BNa and NH₃CCH₄ and O₂DN₂ and CO Like 31 Discuss 1Share1
MDCAT Chemistry Past PapersIBA MDCAT Chemistry Paper Reconduct 2024#Atomic Mass Unit#Stoichiometry367Choose the best answer1 atomic mass unit is approximately equal to: (IBA MDCAT Reconduct 2024)A1.66 × 10⁻²⁴ kgB9.11 × 10⁻³¹ kgC1.66 × 10⁻²⁷ kgD1.67 × 10⁻²⁷ g Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry368Choose 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 Relationship369Choose 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 Atoms370Choose 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