a) 2 i 3
b) 1. SeO2 + 2NaOH --> Na2SeO3 + H2O
4. SiO2 + 2NaOH --> Na2SiO3 + H2O
5. ZnO + 2NaOH + H2O --> Na2[Zn(OH)4]
6. CO2 + 2NaOH --> Na2CO3 + H2O
7. P4O10 + 12NaOH --> 4Na3PO4 + 6H2O
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a) 2 i 3
b) 1. SeO2 + 2NaOH --> Na2SeO3 + H2O
4. SiO2 + 2NaOH --> Na2SiO3 + H2O
5. ZnO + 2NaOH + H2O --> Na2[Zn(OH)4]
6. CO2 + 2NaOH --> Na2CO3 + H2O
7. P4O10 + 12NaOH --> 4Na3PO4 + 6H2O