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nguyenmaihuong08012003
2 năm trước
Bài 4. Cho 52 g Zn tác dụng hết dung dịch axit HCl. Cần phải phân hủy bao nhiêu g KClO3 (có chất xúc tác MnO2) để tạo đủ lượng O2 phản ứng với lượng H2 sinh ra trong phản ứng trên. Bài 5: Cho m gam Al tác dụng vừa đủ với 29,4 gam H2SO4 loãng, thu được V lít khí Hidro ở đktc. a) Tìm m, V. b) Đốt toàn bộ lượng nhôm ở trên thì cần dùng bao nhiêu lít khí oxi ở đktc? c) Tìm khối lượng KMnO4 cần dùng để điều chế lượng O2 đủ phản ứng với nhôm ở trên. d) Dẫn khí H2 thu được qua 1,6 gam Fe2O3 đun nóng. Tính khối lượng kim loại thu được sau phản ứng. Giúp e với ạ. Hứa vote 5 sao ạ
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