3. Classifica os óxidos em: ácidos, básicos, anfóteros, peróxidos, e salinos. a) Li₂O; b) P₂O5 ; c) Mn₂O7; d) Ag₂O; e) As2O3 ; f) H₂O₂; g) Cr₂O3; h) Ag2O2.​
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