Đốt cháy hoàn toàn 6,5 gam Kẽm trong bình chứa khí oxi vừa đủ, sản phẩm tạo thành là kẽm oxit. a) tính thể tích khí oxi đã dùng ở đktc. b) Tính khối lượng sản phẩm tạo thành.

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