StoichiometryMolar Mass201Choose the best answerOne gram-mole of which pair has equal mass?ANO₂ and CO₂BNa and NH₃CCH₄ and O₂DN₂ and CO Like 31 Discuss 1Share1
StoichiometryMole Concept and Number of Atoms202Choose the best answerHow many atoms are present in 1.8 g H₂O?A0.1NAB0.2NAC0.3NAD0.4NA Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Atoms203Choose 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
StoichiometryMole Concept and Number of Atoms204Choose the best answerEqual masses of N₂, H₂ and O₂ are present in a vessel. Which sample contains the least number of atoms?AH₂BN₂CO₂DBoth H₂ and N₂ Like 0 Discuss 0Share
StoichiometryFactors Affecting Percentage Yield205Choose the best answerWhich factor does NOT affect the percentage yield of a reaction?ALoss of product during purificationBSide reactions producing unwanted productsCMeasurement errorsDColour of the product Like 0 Discuss 0Share