StoichiometryMass–Volume Stoichiometry181Choose the best answerWhat volume of O₂ at STP (273 K and 1 atm) is required for complete combustion of 96 g CH₄? CH₄ + 2O₂ → CO₂ + 2H₂OA89.6 dm³B134.4 dm³C268.8 dm³D336.0 dm³ Like 0 Discuss 0Share
Stoichiometry#Atomic Structure#Isotopes182Choose the best answerWhich statement about isotopes is correct?AThey have the same mass number but different atomic numbersBThey have the same atomic number but different mass numbersCThey have the same number of neutrons but different protonsDThey have different atomic numbers and different chemical identities Like 0 Discuss 0Share
StoichiometryMole–Mass Stoichiometry183Choose the best answerWhat mass of SO₂ is formed by burning sulfur in 5.0 mol O₂? S + O₂ → SO₂A640 gB320 gC160 gD80 g Like 0 Discuss 0Share
StoichiometryMolar Mass from Gas Volume184Choose the best answer11.2 dm³ of a gas at STP (273 K and 1 atm) has a mass of 16 g. What is its molar mass?A8 g mol⁻¹B16 g mol⁻¹C32 g mol⁻¹D4 g mol⁻¹ Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Atoms185Choose the best answerWhich pair contains the same number of oxygen atoms?A0.5 mol H₂O and 1 mol SO₂B1 mol CO₂ and 0.5 mol SO₃C0.25 mol H₂O₂ and 0.5 mol H₂ODNone of these Like 0 Discuss 0Share