Задание 2. Запишите правые части химических уравнений и расставьте коэффициенты:
1) Аl + O 2 →
2) C 6 H 6 + O 2 → СО 2 + Н 2 О
3) Са + O 2 →
4) P + O 2 →
5) K + O 2 →
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