August 2021 0 4 Report
Помогите! Указать тип реакции.
1- 4Al+Fe2O3 --> 4Fe+Al2O3
2- Fe(OH)3---->Fe2O3+ 3 H2O
3- 3 H2O+P2O5----> 2 H3PO4
4-H2SO4+2KOH=K2SO4+2H2O
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