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trankimchiminh
2 năm trước
.Trong thành phần phân tử oxit nhất thiết phải có oxi. Hãy lựa chọn nhóm chất nào sau đây là nhóm oxit? * c. NO, NO2, H2SO4, HNO3 a. CaO, CO2, CaCO3, Ca(OH)2 b. SO2, SO3, H2SO3, HNO2 d. H2O, P2O5, BaO, CaO
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