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2 năm trước
1)Đốt cháy hoàn toàn 8 gam Khí metan CH4 thu được Co2 và H2O Tính Khối lượng Khí O2 và khối lượng H2o thu được (Biết C=12, O=16, H=1) a)22 gam và 36 gam. b) 22 gam và 18 gam. c)22 gam và 9 gam. d)44 gam và 9 gam. 2)Có 3 lọ đựng 3 chất khí CH4,Co2,C2H4. Dùng những chất nào để nhận biết 3 chất này? 3) Hình bên dưới
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