А<span>) <span>FeCl3</span> <span>→ Fe(OH)3</span> </span>
Б<span>) <span>K2CO3</span> <span>→ CO2</span> </span>
В<span>) Na → NaCl </span>
Г<span>) <span>Cu(OH)2</span> <span>→ CuSO4</span> </span>
2K+MgO=K2O+Mg
K2O+H2O=2KOH
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