Câu1: Hãy cho biết 3,01.1024 phân tử oxi có khối lượng bao nhiêu gam? Câu 2: Đốt cháy 3,1g photpho trong bình chứa 5g oxi.sau phản có chất nào còn dư? Câu 4: a. Tính V khí oxi ở đktc cần thiết để đốt cháy hết 3,2 g khí metan. b. Tính khối lượng khí CO2 tạo thành Câu 5: Tính khối lượng KClO3 đã bị nhiệt phân hủy biết rằng thể tich khí oxi thu được sau phản ứng là 3,36l (ĐKTC). các thần đồng best hóa vô giúp vs nào tuyệt đối cấm phá spam ok :))

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