1. Write the balanced chemical equation:

2 Na(s) + 2 HCl(aq) → 2 NaCl(aq) + H₂(g)

2. Calculate the moles of sodium:

* Molar mass of Na = 22.99 g/mol

* Moles of Na = (25 g) / (22.99 g/mol) = 1.09 mol

3. Use the mole ratio from the balanced equation:

* The balanced equation shows that 2 moles of Na produce 1 mole of H₂.

4. Calculate the moles of hydrogen gas:

* Moles of H₂ = (1.09 mol Na) * (1 mol H₂ / 2 mol Na) = 0.545 mol H₂

Therefore, 0.545 moles of hydrogen gas will be produced.