Расставьте коэффициенты, определите тип реакции:

а) Н2 +F2 → HF

б) С +Na → Na4C

в) KMnO4 → K2MnO4 + MnO2 + O2↑

г ) Mg(OH)2 +HNO3→ Mg (NO3)2+ H2O

д) Al + HBr→ AlBr3 + H2↑
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