Закончите уравнения реакций:
1) _K + _H2 -->_____
2) _S + _H2 --> _____
3) _Cl2 + _H2 --> _____
4) _C +_H2 --> _____
5) _FeO + _H2 --> _____
6) _Fe2O3 + _H2 --> _____
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