Какой оксид при взаимодействии с KOH образует соль состава K₂XO₄?

  1. N₂O₃
  2. SO₃
  3. P₂O₅
  4. SO₂

📝 Detailed explanation

K₂XO₄ — соль 6-валентного X. SO₃ + 2KOH → K₂SO₄ + H₂O.
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