Among the following oxides, how many of them are amphoteric oxides? `{:((a)B_(2)O_(3),(b)AL_(2)O_(3),(c)CaO,(d)ZnO),((e)Ga_(2)O(

Among the following oxides, how many of them are amphoteric oxides?
`{:((a)B_(2)O_(3),(b)AL_(2)O_(3),(c)CaO,(d)ZnO),((e)Ga_(2)O(3),(f)SnO_(2),(g)PbO_(2),(h)BeO),((i)CuO,(j)Fe_(2)O_(3),,):}`

Among the following oxides, how many of them are amphoteric oxides? `{:((a)B_(2)O_(3),(b)AL_(2)O_(3),(c)CaO,(d)ZnO),((e)Ga_(2)O(3),(f)SnO_(2),(g)PbO_(

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