January 2023 1 3 Report
Укажіть групу оксидів
1)CO,Na2O2,SiO2
2)CaO,ZnO,SO3
3)BaO2,P2O5,NO
4)K2O2,N2O3,Cl2O7​
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na bisektrisi kuta a poznacheno tochku v i cherez neyi provedeno pryamu perpendikul
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