Alkane - trung bình

Home Lớp 9 Khoa học tự nhiên 9 - sách kết nối tri thức Bài 23: AlkaneBài tập trung bình

{"common":{"save":0,"post_id":"7878","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8134","post_id":"7878","mon_id":"1159533","chapter_id":"1159554","question":"Dãy các alkane \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp theo th\u1ee9 t\u1ef1 t\u0103ng d\u1ea7n phân t\u1eed kh\u1ed1i là:  <\/p>","options":["A.<\/strong> hexane, heptane, propane, methane, ethane","B. <\/strong>methane, ethane, propane, hexane, heptane","C.<\/strong> heptane, hexane, propane, ethane, methane","D. <\/strong>methane, ethane, propane, heptane, hexane"],"correct":"2","level":"2","hint":"Phân t\u1eed kh\u1ed1i c\u1ee7a alkane t\u0103ng d\u1ea7n khi s\u1ed1 nguyên t\u1eed carbon trong phân t\u1eed t\u0103ng lên.<\/p>","answer":"\u0110áp án \u0111úng: B. methane, ethane, propane, hexane, heptane<\/strong><\/span><\/p><h4>- Phân t\u1eed kh\u1ed1i c\u1ee7a các ch\u1ea5t:<\/h4>Methane (CH\u2084)<\/strong>: 16 g\/mol<\/p>Ethane (C\u2082H\u2086)<\/strong>: 30 g\/mol<\/p>Propane (C\u2083H\u2088)<\/strong>: 44 g\/mol<\/p>Hexane (C\u2086H\u2081\u2084)<\/strong>: 86 g\/mol<\/p>Heptane (C\u2087H\u2081\u2086)<\/strong>: 100 g\/mol<\/p><h4>- S\u1eafp x\u1ebfp theo th\u1ee9 t\u1ef1 t\u0103ng d\u1ea7n phân t\u1eed kh\u1ed1i: Methane<\/strong> < Ethane<\/strong> < Propane<\/strong> < Hexane<\/strong> < Heptane<\/strong><\/h4>","type":"choose","extra_type":"cloud","time":"0","user_id":"127","test":"0","date":"2024-10-25 14:23:10","option_type":"txt","len":0},{"id":"8135","post_id":"7878","mon_id":"1159533","chapter_id":"1159554","question":"Trong phân t\u1eed hydrocarbon X, hydrogen chi\u1ebfm 25% v\u1ec1 kh\u1ed1i l\u01b0\u1ee3ng. Công th\u1ee9c phân t\u1eed c\u1ee7a X là     <\/strong>                                                                <\/p>","options":["A. <\/strong>CH$_{4}$<\/span>","B.<\/strong> C$_{2}$<\/span>H$_{4}$<\/span>","C. <\/strong>C$_{2}$<\/span>H$_{6}$<\/span>","D. <\/strong>C$_{6}$<\/span>H$_{6}$<\/span>"],"correct":"1","level":"2","hint":"T\u1eeb ph\u1ea7n tr\u0103m nguyên t\u1ed1 tìm ra công th\u1ee9c th\u1ef1c nghi\u1ec7m c\u1ee7a X.<\/p>","answer":"\u0110áp án \u0111úng: A. CH$_{4}$<\/span><\/strong><\/span><\/p>G\u1ecdi công th\u1ee9c phân t\u1eed là CxHy.<\/p>Ta có x : y  = %C \/ 12 : %H \/ 1 = 1 : 4<\/p>→ Công th\u1ee9c th\u1ef1c nghi\u1ec7m là CH$_{4}$<\/span><\/p>→ Công th\u1ee9c phân t\u1eed là CH$_{4}$<\/span>.<\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"127","test":"0","date":"2024-10-25 14:27:02","option_type":"math","len":0},{"id":"8136","post_id":"7878","mon_id":"1159533","chapter_id":"1159554","question":"Ph\u01b0\u01a1ng pháp nào sau \u0111ây có th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ec3 góp ph\u1ea7n h\u1ea1n ch\u1ebf ô nhi\u1ec5m môi tr\u01b0\u1eddng do các ph\u01b0\u01a1ng ti\u1ec7n giao thông gây ra?  <\/p>","options":["A. <\/strong>Không s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ti\u1ec7n giao thông","B.<\/strong> C\u1ea5m các ph\u01b0\u01a1ng ti\u1ec7n giao thông t\u1ea1i các \u0111ô th\u1ecb","C. <\/strong>S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ti\u1ec7n ch\u1ea1y b\u1eb1ng \u0111i\u1ec7n ho\u1eb7c nhiên li\u1ec7u xanh","D. <\/strong>S\u1eed d\u1ee5ng các ph\u01b0\u01a1ng ti\u1ec7n ch\u1ea1y b\u1eb1ng than \u0111á"],"correct":"3","level":"2","hint":"L\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng pháp nào giúp gi\u1ea3m khí th\u1ea3i<\/strong> và t\u0103ng hi\u1ec7u qu\u1ea3 s\u1eed d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng<\/strong>, \u0111\u1ed3ng th\u1eddi có th\u1ec3 thay th\u1ebf d\u1ea7n<\/strong> các lo\u1ea1i ph\u01b0\u01a1ng ti\u1ec7n ch\u1ea1y b\u1eb1ng nhiên li\u1ec7u hóa th\u1ea1ch nh\u01b0 x\u0103ng, d\u1ea7u.<\/p>","answer":"\u0110áp án \u0111úng: C. S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ti\u1ec7n ch\u1ea1y b\u1eb1ng \u0111i\u1ec7n ho\u1eb7c nhiên li\u1ec7u xanh<\/strong><\/span><\/p><\/span>\u0110ây là gi\u1ea3i pháp hi\u1ec7u qu\u1ea3 và b\u1ec1n v\u1eefng<\/strong> vì:<\/p>- Ph\u01b0\u01a1ng ti\u1ec7n \u0111i\u1ec7n<\/strong> không t\u1ea1o ra khí th\u1ea3i gây ô nhi\u1ec5m.<\/p>- Nhiên li\u1ec7u xanh<\/strong> (nh\u01b0 ethanol, biodiesel, hydrogen) gi\u1ea3m thi\u1ec3u phát th\u1ea3i khí nhà kính.<\/p>- Gi\u1ea3i pháp này c\u0169ng kh\u1ea3 thi trong dài h\u1ea1n khi công ngh\u1ec7 s\u1ea3n xu\u1ea5t n\u0103ng l\u01b0\u1ee3ng tái t\u1ea1o phát tri\u1ec3n.<\/p>","type":"choose","extra_type":"cloud","time":"0","user_id":"127","test":"0","date":"2024-10-26 02:23:58","option_type":"txt","len":0}]}