Ответ:
1)2CaO+3H3BO3-Ca3(BO3)2+3H2O
2)Al+O2-Al2O3
3)N2O5+H2O-2HNO3
4)Na2O+SO2-Na2SO3
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Ответ:
1)2CaO+3H3BO3-Ca3(BO3)2+3H2O
2)Al+O2-Al2O3
3)N2O5+H2O-2HNO3
4)Na2O+SO2-Na2SO3