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ngquynhvy
2 năm trước
Tiến hành 2 thí nghiệm: Thí nghiệm 1: Cho a gam Fe hòa tan trong 300 ml dung dịch HCl CM; cô cạn hỗn hợp sau phản ứng ta được 24,65 gam chất rắn. Thí nghiệm 2: Cho a gam Fe và b gam Mg hòa tan trong 300 ml dung dịch HCl CM ; cô cạn hỗn hợp sau phản ứng ta thu được 52,45 gam chất rắn và 3,36 lít khí H2 ( đktc). Tính a, b và C. Biết các phản ứng xảy ra hoàn toàn
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