Химия 8 класс.
1)Fe+HCI=
2)Mg+H2SO4=
3)Al+HBr=
4)Al2O3+HNO3=
5)K2O+H2SO4=
6)CaO+H3PO4=
Поставьте коэффициенты ещё, так скажем уравняйте
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