Найдите объём (н.у.) газа, выделяющегося при термическом разложении 31,6 г KMnO₄.

  1. 2,24
  2. 4,48
  3. 3,36
  4. 6,72

📝 Detailed explanation

2KMnO₄ → K₂MnO₄ + MnO₂ + O₂. n(KMnO₄)=31,6/158=0,2 моль → n(O₂)=0,1 моль → V=2,24 л.
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