Phương trình hóa học nào sau đây không đúng a 2fe 3H2SO4 loãng → Fe2(SO4)3 + 3H2

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1. Cu + 2H2SO4 (đặc) → CuSO4 +SO2 + 2H2O
2. Fe + S (to) → FeS
3. 2Ag + O3 → Ag2O + O2
4. 2Fe + 3H2SO4 (loãng) → Fe2(SO4)3 + 3H2

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Phương trình hóa học nào sau đây là sai?

A. 2Fe + 3H2SO4 → Fe2(SO4)3 + 3H2

B.2Na + 2HCl→2NaCl + H2

C.FeS + H2SO4 (loãng)→FeSO4+ H2S

D.2Cr + 3Cl2→2CrCl3.

A. 2Fe + 3H2SO4 → Fe2(SO4)3 + 3H2