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222-9+11+12:2*14+14 = ? ( )

Hóa học Lớp 10: Câu 5. (Mở rộng) Tính số oxi hóa của: a. Cacbon trong: CH4, CO2, CO, HCO3–, CH3CHO, CH3–CH3, CH3-COOH, CH3–COOK, CH2=CH2, CHCH. b. Lưu huỳnh trong: SO2, H2SO3, S2-, S, SO, HSO, HS-. c. Clo trong: ClO, ClO-, Cl2, ...

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