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Minhton2018
2 năm trước
Hòa tan hết 4,2 g hỗn hợp kim loại Zn và Fe bằng dung dịch H2SO4 đặc nóng thu được 0,025 mol S (sản phẩm khử duy nhất). Cô cạn dung dịch sau phản ứng chất rắn khan thu được là: A. 14,1 g B. 11,4 g C. 6,6 g D. 1,14 g
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