StoichiometryRelative Atomic Mass and Atomic Mass Unit221Choose the best answerOne atom of an element has a mass of 10.86 × 10⁻²⁶ kg. Which element is it most likely to be?ABoron, Ar = 11BCalcium, Ar = 40CSilver, Ar = 108DZinc, Ar = 65.4 Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Atomic and Molecular Mass222Choose the best answerIf the molecular mass of X₂ is 50 u, what is the atomic mass of X?A100 uB25 uC50 uD12.5 u Like 0 Discuss 0Share
StoichiometryMole Concept223Choose the best answerWhich statement is NOT correct about one mole?AIt is a counting unitBIts molar mass can be expressed in gramsCIt contains approximately 6.022 × 10²³ specified entitiesDIt contains a different number of particles for different substances Like 0 Discuss 0Share
StoichiometryMass–Mass Stoichiometry224Choose the best answerWhat mass of O₂ is required to react completely with 27 g Al? 4Al + 3O₂ → 2Al₂O₃A48 gB32 gC24 gD16 g Like 0 Discuss 0Share
StoichiometryMass–Volume Relationship225Choose the best answerWhen the mass of a solid reactant is related to the volume of a gaseous product, which stoichiometric relationship is used?AMass–mass relationshipBMass–volume relationshipCVolume–volume relationshipDNone of these Like 0 Discuss 0Share