10. Розставте коефіцієнти, вкажіть їх суму:
1) Al + O2 ↣ ALO,
2) S + O2 ↣ SO
3) S + O ↣ SO
4) KMnO, ↣ K,MnO + O2 + MnO
г)9
в) 3
б) 5
a) 7
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