Какие вещества обозначены «Х» и «Y» в цепочке превращений:
S + X → SO2 SO2 + Y → H2SO3

  1. X – H2O; Y – O2
  2. X – O2; Y – H2O
  3. X – O2; Y – H2
  4. X – H2; Y - O2

📝 Detailed explanation

S + O₂ → SO₂; SO₂ + H₂O → H₂SO₃.
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