Определите число атомов в молекуле вещества, образующегося при взаимодействии 1 моль кислорода и гидроксида железа(II) с водой.

  1. 7
  2. 2
  3. 5
  4. 6

📝 Detailed explanation

4Fe(OH)₂ + 2H₂O + O₂ → 4Fe(OH)₃. Продукт — Fe(OH)₃: 1+3+3 = 7 атомов.
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