Practice Questions

Stoichiometric calculations depend entirely upon balanced mole ratios.

Each mole of sucrose contains 12 moles of carbon atoms. Therefore, two moles contain 24 moles.

The mole ratio Al:Cl₂ is 2:3. Therefore, 5 moles of aluminium require 7.5 moles of chlorine.

Every mole contains the same number of molecules, although the number of atoms differs.

Stoichiometric coefficients indicate mole relationships among reactants and products.

One mole of Fe₂O₃ produces two moles of iron. Two × 55.85 g equals 111.7 g.

Each formula unit contains three ions. Therefore, one mole contains three times Avogadro's number of ions.

Hydrogen and water have a 1:1 mole relationship in the balanced equation.

Half a mole contains half of Avogadro's number of molecules.

Six moles of water are formed from four moles of ammonia. The ratio simplifies to 3:2.