Al2O3+H2 → Al+H2O
Fe(OH)3 → Fe2O3+H2O
Na+H2SO4 → Na2SO4+H2
Ca(OH)2+H3PO4→Ca3(PO4)2+H2O
MgS+O2→MgO+SO2
Расставьте коэффициенты, срочно
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