Divide the formula of substances into 3 classes and give each the name CuO, KOH, Ca (NO3) 2, CO, FeCl3, Mg (OH) 2, SO3, Na2CO3

Oxides: (contain oxygen, binary compound) CuO, CO, SO3
Bases: (contain hydroxyl group OH and metal) KOH, Mg (OH) 2
Salts: (contain metal and acidic residue) Ca (NO3) 2, FeCl3, Na2CO3



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