Chia 36,44 gam hỗn hợp M gồm FeO Fe2O3 Fe3O4 CuO và ZnO thành 2 phần bằng nhau phần 1 tác dụng hết với dung dịch HCl thu được 38,02g muối khan phần 2 cho tác dụng vừa đủ với 1 lít dung dịch X chứa hai axit là HCl và H2SO4 loãng thu được 42,02g muối khan sau khi cô cạn dung dịch sau phản ứng a) Viết phương trình các phản ứng hóa học xảy ra b) Xác định nồng độ mol của các axit trong dung dịch X Giúp mình câu b với

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