Practice Questions

NH₃ = 2 mol, O₂ = 1.5 mol. O₂ limits. NO = 1.2 mol. Mass = 1.2 × 30 = 36 g.

Stoichiometric mixture. Cl₂ produced = 1 mol = 71 g.

NO = 2 mol and O₂ = 1 mol. Stoichiometric mixture. NO₂ formed = 2 mol.

Limiting reactants are identified by comparing available and required mole ratios.

Carbon is limiting. Si = 1.5 mol. Mass = 1.5 × 28 = 42 g.

245 g = 2 mol KClO₃. O₂ = 3 mol. Volume = 3 × 22.4 = 67.2 dm³.

Ca = 0.5 mol, H₂O = 2 mol. Water left = 1 mol = 18 g.

The limiting reactant determines how much of the excess reactant is consumed.

Al = 1 mol (limiting). Cr produced = 1 mol = 52 g.

CH₄ = 1.25 mol, O₂ = 0.625 mol. Oxygen is insufficient and is limiting.