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kiemksa
2 năm trước
Người ta mạ đồng cho một chiếc hộp trong 7 phút lượng đồng bám vào hộp là 0,84 gram a) cách làm nay dựa trên tác dụng gì của dòng điện b) Trình bày cách làm c) trong bao lâu thì đồng bám vào hộp là 3,6 g
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