va rog muuult rezolvați corect aceste exercitii
dau coroana
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2HNO3 + Ca(OH)2-----> Ca(NO3)2 +2h2o
acid baza sare
Na2O+ H2O---> 2NaOH
oxid baza
2A l +3S----> Al2S3
metal nemetal sare
3Ca(OH)2+2FeCl3---> 2Fe(OH)3+3CaCl2
baza sare baza sare