Question Detail
Question
Which compound is the limiting reagent if 35 kg of N₂ reacts with 15 kg of H₂ in the reaction N₂ + 3H₂ → 2NH₃?
Correct Answer
Option A is the correct answer.
Detailed Explanation
Molar mass N₂ = 28 g/mol, so moles N₂ = 35000 g / 28 g/mol = 1250 mol. Molar mass H₂ = 2 g/mol, so moles H₂ = 15000 g / 2 g/mol = 7500 mol. The required H₂ for 1250 mol N₂ is 1250 × 3 = 3750 mol. Since 7500 mol H₂ is available and only 3750 mol is needed, N₂ is the limiting reagent.
Hint
Calculate the moles of each reactant and compare the actual mole ratio to the required stoichiometric ratio.