СРОЧНО!!!
Напишите уравнения реакций, расставьте коэффициенты и укажите тип химической реакции:
1) СaCO3 -> CaO + ...
2) CuSO4 + NaOH -> ... + ...
3) HCl + Fe -> ... + H2
4) Li2O + H2O -> ...
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