1. Write the balanced chemical equation:

Mg(OH)₂ + H₂SO₄ → MgSO₄ + 2H₂O

2. Determine the mole ratio:

From the balanced equation, we see that 1 mole of Mg(OH)₂ reacts with 1 mole of H₂SO₄ to produce 2 moles of H₂O.

3. Calculate the moles of H₂O:

Since we have 1 mole of Mg(OH)₂, and the mole ratio is 1:2, we will produce 2 moles of H₂O.

Therefore, 2 moles of H₂O are produced when 1 mole of Mg(OH)₂ reacts with H₂SO₄.