Bài tập trung bình bài Bài 35: Cấu tạo phân tử hợp chất hữu cơ

Home Lớp 9 Hóa học 9 Bài 35: Cấu tạo phân tử hợp chất hữu cơ Bài tập luyện

{"segment":[{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" Trong c\u00e1c h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1, cacbon lu\u00f4n c\u00f3 ho\u00e1 tr\u1ecb l\u00e0 ","select":["A. I","B. IV","C. III.","D. II."],"hint":"","explain":"Trong c\u00e1c h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 cacbon lu\u00f4n c\u00f3 h\u00f3a tr\u1ecb IV<br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2351},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" Ho\u00e1 tr\u1ecb c\u1ee7a cacbon, oxi, hi\u0111ro trong h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 l\u1ea7n l\u01b0\u1ee3t ","select":["A. IV, II, II.","B. IV, III, I.","C. II, IV, I. ","D. IV, II, I."],"hint":"","explain":"Ho\u00e1 tr\u1ecb c\u1ee7a cacbon, oxi, hi\u0111ro trong h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 l\u1ea7n l\u01b0\u1ee3t l\u00e0 IV, II, I.<br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2352},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" Nguy\u00ean t\u1eed cacbon c\u00f3 th\u1ec3 li\u00ean k\u1ebft tr\u1ef1c ti\u1ebfp v\u1edbi nhau t\u1ea1o th\u00e0nh c\u00e1c d\u1ea1ng m\u1ea1ch cacbon l\u00e0 ","select":["A. m\u1ea1ch v\u00f2ng.","B. m\u1ea1ch th\u1eb3ng, m\u1ea1ch nh\u00e1nh.","C. m\u1ea1ch v\u00f2ng, m\u1ea1ch th\u1eb3ng, m\u1ea1ch nh\u00e1nh.","D. m\u1ea1ch nh\u00e1nh."],"hint":"","explain":"Nguy\u00ean t\u1eed cacbon c\u00f3 th\u1ec3 li\u00ean k\u1ebft tr\u1ef1c ti\u1ebfp v\u1edbi nhau t\u1ea1o th\u00e0nh c\u00e1c d\u1ea1ng m\u1ea1ch: m\u1ea1ch v\u00f2ng, m\u1ea1ch th\u1eb3ng, m\u1ea1ch nh\u00e1nh.<br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2353},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" C\u00f4ng th\u1ee9c c\u1ea5u t\u1ea1o c\u1ee7a m\u1ed9t h\u1ee3p ch\u1ea5t cho bi\u1ebft ","select":["A. th\u00e0nh ph\u1ea7n ph\u00e2n t\u1eed.","B. tr\u1eadt t\u1ef1 li\u00ean k\u1ebft gi\u1eefa c\u00e1c nguy\u00ean t\u1eed trong ph\u00e2n t\u1eed.","C. th\u00e0nh ph\u1ea7n ph\u00e2n t\u1eed v\u00e0 tr\u1eadt t\u1ef1 li\u00ean k\u1ebft gi\u1eefa c\u00e1c nguy\u00ean t\u1eed trong ph\u00e2n t\u1eed","D. th\u00e0nh ph\u1ea7n ph\u00e2n t\u1eed v\u00e0 s\u1ef1 tham gia li\u00ean k\u1ebft v\u1edbi c\u00e1c h\u1ee3p ch\u1ea5t kh\u00e1c."],"hint":"","explain":"C\u00f4ng th\u1ee9c c\u1ea5u t\u1ea1o c\u1ee7a m\u1ed9t h\u1ee3p ch\u1ea5t cho bi\u1ebft: th\u00e0nh ph\u1ea7n ph\u00e2n t\u1eed v\u00e0 tr\u1eadt t\u1ef1 li\u00ean k\u1ebft gi\u1eefa c\u00e1c nguy\u00ean t\u1eed trong ph\u00e2n t\u1eed.<br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2354},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" C\u00f4ng th\u1ee9c c\u1ea5u t\u1ea1o $CH_3 \u2013 CH_2 \u2013 CH_2 \u2013 CH_2 \u2013 CH_3$ bi\u1ec3u di\u1ec5n ch\u1ea5t c\u00f3 c\u00f4ng th\u1ee9c l\u00e0:","select":["A. $C_5H_{10}$.","B. $C_2H_6$.","C. $C_5H_{12}$. ","D. $C_4H_{10}$."],"hint":"","explain":"$CH_3 \u2013 CH_2 \u2013 CH_2 \u2013 CH_2 \u2013 CH_3$: $C_5H_{12}$.<br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2355},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" C\u00f4ng th\u1ee9c c\u1ea5u t\u1ea1o $CH_3 \u2013 CH_2 \u2013 CH_2 \u2013 CH_2 \u2013 OH$ bi\u1ec3u di\u1ec5n ch\u1ea5t c\u00f3 c\u00f4ng th\u1ee9c l\u00e0","select":["A. $C_4H_8OH$ ","B. $C_4H_9O$","C. $C_4H_9OH$ ","D. $C_4H_{11}O$"],"hint":"","explain":"$CH_3 \u2013 CH_2 \u2013 CH_2 \u2013 CH_2 \u2013 OH$: $C_4H_9OH$ <br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2356},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" C\u00f4ng th\u1ee9c c\u1ea5u t\u1ea1o sau thu\u1ed9c lo\u1ea1i m\u1ea1ch cacbon n\u00e0o : <br\/><center><img src='https://www.luyenthi123.com/file/luyenthi123/lop9/hoahoc/bai35/lv2/img\/Capture1.PNG' \/><\/center>","select":["A. M\u1ea1ch nh\u00e1nh","B. M\u1ea1ch v\u00f2ng","C. M\u1ea1ch th\u1eb3ng","D. M\u1ea1ch tr\u00f2n"],"hint":"","explain":"<br\/><center><img src='https://www.luyenthi123.com/file/luyenthi123/lop9/hoahoc/bai35/lv2/img\/Capture1.PNG' \/><\/center> tr\u00f9ng v\u1edbi c\u00f4ng th\u1ee9c $CH_3 \u2013 CH_2 \u2013 CH_2 \u2013 CH_2 \u2013 CH_3$ c\u00f3 d\u1ea1ng m\u1ea1ch th\u1eb3ng.<br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2357},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" C\u00f4ng th\u1ee9c c\u1ea5u t\u1ea1o thu g\u1ecdn c\u1ee7a $C_2H_6$ l\u00e0:","select":["A. $CH_4 \u2013 CH_2$ ","B. $CH \u2013 CH_5$","C. $CH_3 \u2013 CH_3$","D. $CH_2 \u2013 CH_3$"],"hint":"","explain":"$C_2H_6$: c\u00f4ng th\u1ee9c thu g\u1ecdn l\u00e0 $CH_3 \u2013 CH_3$<br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2358},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" Hi\u0111rocacbon A c\u00f3 ph\u00e2n t\u1eed kh\u1ed1i l\u00e0 30 \u0111vC. C\u00f4ng th\u1ee9c ph\u00e2n t\u1eed c\u1ee7a A l\u00e0 ","select":["A. $CH_4$.","B. $C_2H_6$.","C. $C_3H_8$.","D. $C_2H_4$."],"hint":"","explain":"Ph\u00e2n t\u1eed kh\u1ed1i l\u00e0 30 ch\u1ec9 c\u00f3 \u0111\u00e1p \u00e1n B th\u1ecfa m\u00e3n<br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2359},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" S\u1ea3n ph\u1ea9m ch\u1ee7 y\u1ebfu c\u1ee7a m\u1ed9t h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 khi ch\u00e1y l\u00e0","select":["A. kh\u00ed nit\u01a1 v\u00e0 h\u01a1i n\u01b0\u1edbc ","B. kh\u00ed cacbonic v\u00e0 kh\u00ed hi\u0111ro.","C. kh\u00ed cacbonic v\u00e0 cacbon.","D. kh\u00ed cacbonic v\u00e0 h\u01a1i n\u01b0\u1edbc."],"hint":"","explain":"S\u1ea3n ph\u1ea9m ch\u1ee7 y\u1ebfu c\u1ee7a 1 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 khi ch\u00e1y l\u00e0 kh\u00ed $CO_2$ v\u00e0 $H_2O$<br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2360},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" T\u1ec9 kh\u1ed1i h\u01a1i c\u1ee7a kh\u00ed A \u0111\u1ed1i v\u1edbi $CH_4$ l\u00e0 1,75 th\u00ec kh\u1ed1i l\u01b0\u1ee3ng ph\u00e2n t\u1eed c\u1ee7a A l\u00e0","select":["A. 20 \u0111vC. ","B. 24 \u0111vC.","C. 29 \u0111vC.","D. 28 \u0111vC."],"hint":"","explain":"${{d}_{A\/C{{H}_{4}}}}=1,75\\Rightarrow {{M}_{A}}=16.1,75=28$ <br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2361},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" C\u00f9ng 1 c\u00f4ng th\u1ee9c ph\u00e2n t\u1eed nh\u01b0ng tr\u1eadt t\u1ef1 li\u00ean k\u1ebft gi\u1eefa c\u00e1c nguy\u00ean t\u1eed trong ph\u00e2n t\u1eed kh\u00e1c nhau s\u1ebd bi\u1ec3u di\u1ec5n","select":["A. C\u00f9ng 1 ch\u1ea5t, t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc gi\u1ed1ng nhau. ","B. Hai ch\u1ea5t kh\u00e1c nhau nh\u01b0ng c\u00f3 t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc gi\u1ed1ng nhau","C. Hai ch\u1ea5t kh\u00e1c nhau, c\u00f3 t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc kh\u00e1c nhau","D. C\u00f9ng 1 ch\u1ea5t, t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc kh\u00e1c nhau."],"hint":"","explain":"M\u1ed7i h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 c\u00f3 1 tr\u1eadt t\u1ef1 li\u00ean k\u1ebft x\u00e1c \u0111\u1ecbnh gi\u1eefa c\u00e1c nguy\u00ean t\u1eed trong ph\u00e2n t\u1eed. C\u00e1c ch\u1ea5t ch\u1ea5t c\u00f3 c\u00f9ng c\u00f4ng th\u1ee9c nh\u01b0ng kh\u00e1c nhau tr\u1eadt t\u1ef1 li\u00ean k\u1ebft gi\u1eefa c\u00e1c nguy\u00ean t\u1eed trong ph\u00e2n t\u1eed kh\u00e1c nhau l\u00e0 2 ch\u1ea5t kh\u00e1c nhau v\u00e0 c\u00f3 t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc kh\u00e1c nhau<br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2362},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" H\u00e3y cho bi\u1ebft ch\u1ea5t n\u00e0o sau \u0111\u00e2y trong ph\u00e2n t\u1eed ch\u1ec9 c\u00f3 li\u00ean k\u1ebft \u0111\u01a1n ","select":["A. $C_6H_6$.","B. $C_2H_4$.","C. $CH_4$. ","D. $C_2H_2$."],"hint":"","explain":"<br\/><center><img src='https://www.luyenthi123.com/file/luyenthi123/lop9/hoahoc/bai35/lv2/img\/Capture2.PNG' \/><\/center> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2363},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" Khi ph\u00e2n t\u00edch m\u1ed9t hi\u0111rocacbon (X) ch\u1ee9a 81,82% cacbon. C\u00f4ng th\u1ee9c ph\u00e2n t\u1eed c\u1ee7a (X) l\u00e0","select":["A. $C_3H_8$.","B. $C_3H_6$.","C. $CH_4$.","D. $C_4H_{10}$."],"hint":"","explain":"T\u00ednh h\u00e0m l\u01b0\u1ee3ng C \u1edf 4 \u0111\u00e1p \u00e1n ch\u1ec9 c\u00f3 \u0111\u00e1p \u00e1n A c\u00f3 h\u00e0m l\u01b0\u1ee3ng C l\u00e0 81,82%.$A.\\%{{m}_{C}}=\\dfrac{12.3}{44}.100\\%\\approx 81,82\\%$ <br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2364},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"M\u1ed9t hi\u0111rocacbon (X) \u1edf th\u1ec3 kh\u00ed c\u00f3 ph\u00e2n t\u1eed kh\u1ed1i n\u1eb7ng g\u1ea5p \u0111\u00f4i ph\u00e2n t\u1eed kh\u1ed1i trung b\u00ecnh c\u1ee7a kh\u00f4ng kh\u00ed. C\u00f4ng th\u1ee9c ph\u00e2n t\u1eed c\u1ee7a (X) l\u00e0 ","select":["A. $C_4H_{10}$.","B. $C_4H_8$.","C. $C_4H_6$.","D. $C_5H_{10}$"],"hint":"","explain":"${{d}_{X\/KK}}=2\\Rightarrow {{M}_{A}}=2.29=58$ .Ch\u1ec9 c\u00f3 \u0111\u00e1p \u00e1n A th\u1ecfa m\u00e3n<br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2365},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" Khi ph\u00e2n t\u00edch m\u1ed9t hi\u0111rocacbon (X) ch\u1ee9a 14,3% hi\u0111ro. C\u00f4ng th\u1ee9c ph\u00e2n t\u1eed c\u1ee7a (X) l\u00e0","select":["A. $C_3H_8$. ","B. $C_3H_8$.","C. $C_2H_4$.","D. $C_4H_{10}$."],"hint":"","explain":"T\u00ednh h\u00e0m l\u01b0\u1ee3ng H \u1edf 4 \u0111\u00e1p \u00e1n ch\u1ec9 c\u00f3 \u0111\u00e1p \u00e1n C th\u1ecfa m\u00e3n $C.\\%{{m}_{H}}=\\dfrac{4}{28}.100\\%\\approx 14,3\\%$ <br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2366},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" C\u00f4ng th\u1ee9c $C_2H_6O$ c\u00f3 bao nhi\u00eau c\u00f4ng th\u1ee9c c\u1ea5u t\u1ea1o kh\u00e1c nhau:","select":["A. 1","B. 2","C. 3 ","D. 4"],"hint":"","explain":"<br\/><center><img src='https://www.luyenthi123.com/file/luyenthi123/lop9/hoahoc/bai35/lv2/img\/Capture3.PNG' \/><\/center> <br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2367},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" C\u00f4ng th\u1ee9c $C_2H_6$ c\u00f3 bao nhi\u00eau c\u00f4ng th\u1ee9c c\u1ea5u t\u1ea1o kh\u00e1c nhau:","select":["A. 1","B. 2","C. 3 ","D. 4"],"hint":"","explain":"<br\/><center><img src='https://www.luyenthi123.com/file/luyenthi123/lop9/hoahoc/bai35/lv2/img\/Capture18.PNG' \/><\/center> <br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2368},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" \u0110\u1ed1t ch\u00e1y m gam hi\u0111rocacbon A thu \u0111\u01b0\u1ee3c 2,688 l\u00edt $CO_2$ (\u0111ktc) v\u00e0 4,32 g $H_2O$ . C\u00f4ng th\u1ee9c ph\u00e2n t\u1eed c\u1ee7a A l\u00e0","select":["A. $C_2H_6$","B. $C_2H_4$","C. $C_2H_2$","D. $CH_4$"],"hint":"","explain":"G\u1ecdi c\u00f4ng th\u1ee9c c\u1ee7a hi\u0111rocacbon l\u00e0 $C_xH_y$ <br\/> $\\begin{aligned} & 2{{C}_{x}}{{H}_{y}}+\\dfrac{4x+y}{2}{{O}_{2}}\\xrightarrow{{{t}^{0}}}2xC{{O}_{2}}+y{{H}_{2}}O \\\\ & \\dfrac{{{n}_{C{{O}_{2}}}}}{{{n}_{{{H}_{2}}O}}}=\\dfrac{0,12}{0,24}=\\dfrac{1}{2}\\Rightarrow \\dfrac{2x}{y}=\\dfrac{1}{2}\\Rightarrow \\dfrac{x}{y}=\\dfrac{1}{4} \\\\ \\end{aligned}$ <br\/> Ch\u1ec9 c\u00f3 \u0111\u00e1p \u00e1n D th\u1ecfa m\u00e3n <br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2369},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" \u0110\u1ed1t ch\u00e1y ho\u00e0n to\u00e0n m gam h\u1ed7n h\u1ee3p 2 hi\u0111rocacbon thu \u0111\u01b0\u1ee3c 17,6 g $CO_2$ v\u00e0 14,4 g $H_2O$ . m c\u00f3 gi\u00e1 tr\u1ecb l\u00e0:","select":["A. 32 g","B. 6,4 g","C. 12,8 g ","D. 16 g"],"hint":"","explain":"$\\begin{aligned} & {{n}_{C{{O}_{2}}}}=0,4\\,mol,\\,{{n}_{{{H}_{2}}O}}=0,8\\,mol \\\\ & \\Rightarrow {{n}_{C}}={{n}_{C{{O}_{2}}}}=0,4\\,mol;\\,\\,\\,{{n}_{H}}=2{{n}_{{{H}_{2}}O}}=1,6\\,mol \\\\ & \\Rightarrow {{m}_{HC}}={{m}_{C}}+{{m}_{H}}=0,4.12+1,6.1=6,4\\,gam \\\\ \\end{aligned}$ <br\/> V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2370}],"lesson":{"save":0,"level":2}}

Điểm của bạn.

Câu hỏi này theo dạng chọn đáp án đúng, sau khi đọc xong câu hỏi, bạn bấm vào một trong số các đáp án mà chương trình đưa ra bên dưới, sau đó bấm vào nút gửi để kiểm tra đáp án và sẵn sàng chuyển sang câu hỏi kế tiếp

Trả lời đúng trong khoảng thời gian quy định bạn sẽ được + số điểm như sau:
Trong khoảng 1 phút đầu tiên	+ 5 điểm
Trong khoảng 1 phút -> 2 phút	+ 4 điểm
Trong khoảng 2 phút -> 3 phút	+ 3 điểm
Trong khoảng 3 phút -> 4 phút	+ 2 điểm
Trong khoảng 4 phút -> 5 phút	+ 1 điểm

Quá 5 phút: không được cộng điểm

Tổng thời gian làm mỗi câu (không giới hạn)

Điểm của bạn.

Bấm vào đây nếu phát hiện có lỗi hoặc muốn gửi góp ý

Em chưa làm xong câu này