Practice Questions

The reactants are in the exact stoichiometric ratio. Four moles NH₃ = 68 g are produced.

O₂ is limiting. Four moles CO₂ are formed and 1 mol CO remains.

The excess reactant remains after the limiting reactant is exhausted.

O₂ is limiting. One mole NO (30 g) is formed.

0.1 mol NaOH is insufficient to react completely with 0.1 mol H₂SO₄.

Stoichiometric reaction produces 4 mol CO₂ = 89.6 dm³.

A is limiting. Product formed = (2/3) × 3 = 2 mol.

Industries optimize limiting reactants to maximize efficiency.

Stoichiometric mixture produces 3 mol S = 96 g.

Mg is limiting. Two moles Mg produce 2 mol MgO = 80 g.