StoichiometryBalancing Chemical Equations51Choose the best answerWhen the equation is balanced using the smallest whole-number coefficients: C₆H₁₄ + O₂ → CO₂ + H₂O the coefficient of O₂ is:A1.5B13C19D38 Like 0 Discuss 0Share
StoichiometryMole#Mole Concept52Choose the best answerWhat is the mass of one gram-ion of OH⁻?A1 gB17C17 uD17 g Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry53Choose the best answerWhat volume of CO₂ at STP (273 K and 1 atm) is produced by complete combustion of 7 g C₂H₄? C₂H₄ + 3O₂ → 2CO₂ + 2H₂OA44.8 dm³B22.4 dm³C11.2 dm³D5.6 dm³ Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Molecules54Choose the best answerA sample of H₂ contains 3.01 × 10²³ molecules. What is its approximate mass?A2 gB1 gC0.5 gDNone of these Like 0 Discuss 0Share
StoichiometryLimiting Reagent and Excess Reactant55Choose the best answer14 g N₂ reacts with 6 g H₂: N₂ + 3H₂ → 2NH₃ How much H₂ remains unreacted?A1.5 molB2.0 molC0.5 molD2/3 mol Like 0 Discuss 0Share