Provide the balanced formation equation for Na₂SiO₃(s) using elements in their standard states.

• A. 2 Na(g) + Si(g) + 3 O₂(g) → Na₂SiO₃(s)
• B. 4 Na(s) + 2 Si(s) + 3 O₂(g) → 2 Na₂SiO₃(s)
• C. Na(s) + Si(l) + O₂(g) → 1/2 Na₂SiO₃(s)
• D. 2 Na(s) + Si(s) + 3/2 O₂(g) → Na₂SiO₃(s)

Answer: (D)