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nguyentrongv3
1 năm trước
Giúp vs ạ!!! Câu 2: Đốt cháy 6,72 lít khí etilen (đktc), dẫn sản phẩm cháy từ từ qua bình chứa dd Ca(OH)2. a) Viết PTHH đốt cháy etilen. Tính thể tích CO2 thu được. b) Hãy tính khối lượng dd Ca(OH)2 tối thiểu cần dùng để hấp thụ lượng CO2 sinh ra. Câu 3: Dẫn hỗn hợp gồm CH4 và C2H4 (đktc) lội qua dung dịch Brom 2M (vừa đủ) thấy bình brom tăng thêm 5,6 gam và khí thoát ra. Đem đốt cháy hoàn toàn khí thoát ra thu được 0,2 mol khí CO2. a/ Viết PTHH và tính phần trăm về thể tích của mỗi khí trong hỗn hợp ban đầu. b/Tính thể tích dung dịch brom tham gia phản ứng.
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