4. Виберіть реакцію заміщення.
a)Fe+S=FeS
б) 2HgO+C=2Hg+CO,
в)ZnCl2 +2KOH=Zn(OH)2 +2 KCI
СРОЧНО ХИМИЯ+ объяснение.❗❗❗❗❗❗❗❗
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