Moles and Avogadro's Numbers

Glucose contains six carbon atoms per molecule. Therefore, 0.5 mole of carbon atoms corresponds to 0.5 ÷ 6 = 0.083 mole of glucose.

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

Na₂SO₄ contains two sodium ions per formula unit. Therefore, 0.5 mole gives one mole of Na⁺ ions.

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

Hydrogen is the limiting reactant because 9 moles are required. Six moles of hydrogen produce four moles of ammonia.

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

Stoichiometric coefficients indicate mole relationships among reactants and products.

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

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

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

Stoichiometric calculations depend entirely upon balanced mole ratios.

This represents 0.5 mole of water. Half of 18 g equals 9 g.

The balanced equation shows that 1 mole of nitrogen reacts with 3 moles of hydrogen, giving a mole ratio of 1:3.

One mole of propane requires 5 moles of oxygen. Therefore, 2 moles require 10 moles of oxygen.

Every mole contains 6.022 × 10²³ particles regardless of the substance.

Since one mole contains Avogadro's number of atoms, dividing the molar mass by this constant gives the mass of one atom.

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