Объяснение:
4K + O2= 2K2O
2Na + 2H2O = 2NaOH + Н2↑
Zn + 2HCl= ZnCl2 + H2↑
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Объяснение:
4K + O2= 2K2O
2Na + 2H2O = 2NaOH + Н2↑
Zn + 2HCl= ZnCl2 + H2↑