{"segment":[{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" D\u00e3y c\u00e1c h\u1ee3p ch\u1ea5t n\u00e0o sau \u0111\u00e2y l\u00e0 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 ","select":["A. $CH_4, C_2H_6, CO_2$.","B. $C_6H_6, CH_4, C_2H_5OH$.","C. $CH_4, C_2H_2, CO$.","D. $C_2H_2, C_2H_6O, CaCO_3$."],"hint":"","explain":"<span class='basic_left'>H\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 l\u00e0 h\u1ee3p ch\u1ea5t c\u1ee7a C tr\u1eeb ($CO, CO_2, H_2CO_3$, c\u00e1c mu\u1ed1i cabonat kim lo\u1ea1i,....)<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2331},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"D\u00e3y c\u00e1c ch\u1ea5t n\u00e0o sau \u0111\u00e2y \u0111\u1ec1u l\u00e0 hi\u0111rocacbon ","select":["A. $C_2H_6, C_4H_{10}, C_2H_4$.","B. $CH_4, C_2H_2, C_3H_7Cl$","C. $C_2H_4, CH_4, C_2H_5Cl$. ","D. $C_2H_6O, C_3H_8, C_2H_2$."],"hint":"","explain":"<span class='basic_left'>Hi\u0111rocacbon l\u00e0 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 ch\u1ec9 ch\u1ee9a C v\u00e0 H trong ph\u00e2n t\u1eed<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2332},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" D\u00e3y c\u00e1c ch\u1ea5t n\u00e0o sau \u0111\u00e2y \u0111\u1ec1u l\u00e0 d\u1eabn xu\u1ea5t c\u1ee7a hi\u0111rocacbon ","select":["A. $C_2H_6O, CH_4, C_2H_2$.","B. $C_2H_4, C_3H_7Cl, CH_4$","C. $C_2H_6O, C_3H_7Cl, C_2H_5Cl$.","D. $C_2H_6O, C_3H_8, C_2H_2$"],"hint":"","explain":"<span class='basic_left'>D\u1eabn xu\u1ea5t c\u1ee7a hi\u0111rocacbon l\u00e0 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 ngo\u00e0i c\u00e1c nguy\u00ean t\u1ed1 C v\u00e0 H trong ph\u00e2n t\u1eed c\u00f2n c\u00f3 c\u00e1c nguy\u00ean t\u1ed1 kh\u00e1c nh\u01b0 O, N, ....<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2333},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" Trong c\u00e1c ch\u1ea5t sau: $CH_4, CO_2, C_2H_4, Na_2CO_3, C_2H_5ONa$ c\u00f3 ","select":["A. 1 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 v\u00e0 4 h\u1ee3p ch\u1ea5t v\u00f4 c\u01a1. ","B. 2 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 v\u00e0 3 h\u1ee3p ch\u1ea5t v\u00f4 c\u01a1.","C. 4 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 v\u00e0 1 h\u1ee3p ch\u1ea5t v\u01a1 c\u01a1.","D. 3 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 v\u00e0 2 h\u1ee3p ch\u1ea5t v\u00f4 c\u01a1."],"hint":"","explain":"<span class='basic_left'>$CH_4, C_2H_4, C_2H_5ONa$ : h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 <br\/>$CO_2, Na_2CO_3$: h\u1ee3p ch\u1ea5t v\u00f4 c\u01a1<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2334},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"D\u1ef1a vao d\u1eef ki\u1ec7n n\u00e0o sau \u0111\u00e2y \u0111\u1ec3 c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh m\u1ed9t h\u1ee3p ch\u1ea5t l\u00e0 v\u00f4 c\u01a1 hay h\u1eefu c\u01a1","select":["A. Tr\u1ea1ng th\u00e1i (r\u1eafn, l\u1ecfng, kh\u00ed) ","B. M\u00e0u s\u1eafc ","C. Th\u00e0nh ph\u1ea7n nguy\u00ean t\u1ed1 ","D. \u0110\u1ed9 tan trong n\u01b0\u1edbc."],"hint":"","explain":"<span class='basic_left'>H\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 l\u00e0 h\u1ee3p ch\u1ea5t c\u1ee7a C tr\u1eeb ($CO, CO_2, H_2CO_3$, c\u00e1c mu\u1ed1i cabonat kim lo\u1ea1i,....)<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2335},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"H\u00f3a h\u1ecdc h\u1eefu c\u01a1 l\u00e0:","select":["A. Ng\u00e0nh h\u00f3a h\u1ecdc chuy\u00ean nghi\u00ean c\u1ee9u c\u00e1c h\u1ee3p ch\u1ea5t c\u00f3 trong t\u1ef1 nhi\u00ean","B. Ng\u00e0nh h\u00f3a h\u1ecdc chuy\u00ean nghi\u00ean c\u1ee9u c\u00e1c h\u1ee3p ch\u1ea5t c\u1ee7a cacbon","C. Ng\u00e0nh h\u00f3a h\u1ecdc chuy\u00ean nghi\u00ean c\u1ee9u v\u1ec1 c\u00e1c h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1","D. Ng\u00e0nh h\u00f3a h\u1ecdc chuy\u00ean nghi\u00ean c\u1ee9u c\u00e1c ch\u1ea5t trong c\u01a1 th\u1ec3 s\u1ed1ng"],"hint":"","explain":"<span class='basic_left'>H\u00f3a h\u1ecdc h\u1eefu c\u01a1 l\u00e0 ng\u00e0nh h\u00f3a h\u1ecdc chuy\u00ean nghi\u00ean c\u1ee9u v\u1ec1 c\u00e1c h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 v\u00e0 nh\u1eefng bi\u1ebfn \u0111\u1ed5i c\u1ee7a ch\u00fang.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2336},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Th\u00e0nh ph\u1ea7n c\u1ee7a h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 nh\u1ea5t thi\u1ebft ph\u1ea3i c\u00f3 nguy\u00ean t\u1ed1","select":["A. C ","B. H","C. O","D. N"],"hint":"","explain":"<span class='basic_left'>H\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 l\u00e0 h\u1ee3p ch\u1ea5t c\u1ee7a C tr\u1eeb ($CO, CO_2, H_2CO_3$, c\u00e1c mu\u1ed1i cabonat kim lo\u1ea1i,....)<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2337},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" Theo th\u00e0nh ph\u1ea7n nguy\u00ean t\u1ed1 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 \u0111\u01b0\u1ee3c chia th\u00e0nh","select":["A. Hi\u0111rocacbon v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t kh\u00f4ng ph\u1ea3i hi\u0111rocacbon","B. Hi\u0111rocacbon v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t ch\u1ee9a oxi","C. Hi\u0111rocacbon v\u00e0 d\u1eabn xu\u1ea5t c\u1ee7a hi\u0111rocacbon ","D. Hi\u0111rocacbon v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t c\u00f3 nh\u00f3m ch\u1ee9c"],"hint":"","explain":"<span class='basic_left'>D\u1ef1a v\u00e0o th\u00e0nh ph\u1ea7n ph\u00e2n t\u1eed h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 \u0111\u01b0\u1ee3c chia th\u00e0nh 2 lo\u1ea1i: Hi\u0111rocacbon v\u00e0 d\u1eabn xu\u1ea5t c\u1ee7a hi\u0111rocacbon<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2338},{"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 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 lu\u00f4n sinh ra kh\u00ed","select":["A. $O_2$ ","B. $CO_2$ ","C. $SO_2$ ","D. $H_2$"],"hint":"","explain":"<span class='basic_left'>\u0110\u1ed1t ch\u00e1y c\u00e1c h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 lu\u00f4n sinh ra kh\u00ed $CO_2$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2339},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" % kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a $C$ trong h\u1ee3p ch\u1ea5t $CCl_4$ l\u00e0:","select":["A. 5,7% ","B. 6,9%","C. 7,8%","D. 8,4%"],"hint":"","explain":"<span class='basic_left'>$\\%{{m}_{C}}=\\dfrac{12}{154}.100\\%\\approx 7,8%$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2340},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" H\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 KH\u00d4NG c\u00f3 trong:","select":["A. G\u1ea1o, th\u1ecbt, c\u00e1","B. Qu\u1ea7n \u00e1o, gi\u1ea5y, m\u1ef1c","C. \u0110\u00e1 v\u00f4i ","D. Trong c\u01a1 th\u1ec3 s\u1ed1ng"],"hint":"","explain":"<span class='basic_left'>H\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 c\u00f3 nhi\u1ec1u trong g\u1ea1o, th\u1ecbt, c\u00e1, qu\u1ea7n \u00e1o, trong c\u01a1 th\u1ec3 s\u1ed1ng,.... <br\/>\u0110\u00e1 v\u00f4i c\u00f3 th\u00e0nh ph\u1ea7n ch\u00ednh l\u00e0 $CaCO_3$<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2341},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" $CHCl_3$ thu\u1ed9c lo\u1ea1i h\u1ee3p ch\u1ea5t n\u00e0o sau \u0111\u00e2y","select":["A. Hi\u0111rocacbon ","B. H\u1ee3p ch\u1ea5t kh\u00f4ng ph\u1ea3i hi\u0111rocacbon","C. D\u1eabn xu\u1ea5t c\u1ee7a hi\u0111rocacbon ","D. H\u1ee3p ch\u1ea5t v\u00f4 c\u01a1"],"hint":"","explain":"<span class='basic_left'>D\u1eabn xu\u1ea5t c\u1ee7a hi\u0111rocacbon l\u00e0 h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 ngo\u00e0i c\u00e1c nguy\u00ean t\u1ed1 C v\u00e0 H trong ph\u00e2n t\u1eed c\u00f2n c\u00f3 c\u00e1c nguy\u00ean t\u1ed1 kh\u00e1c nh\u01b0 O, N, ....<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2342},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" Th\u00e0nh ph\u1ea7n ph\u1ea7n tr\u0103m v\u1ec1 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a c\u00e1c nguy\u00ean t\u1ed1 C, H, O trong $C_2H_6O$ l\u1ea7n l\u01b0\u1ee3t l\u00e0 ","select":["A. 52,2%; 13%; 34,8%.","B. 52,2%; 34,8%; 13%.","C. 13%; 34,8%; 52,2%. ","D. 34,8%; 13%; 52,2%"],"hint":"","explain":"<span class='basic_left'>$\\begin{aligned}& \\%{{m}_{C}}=\\dfrac{12.2}{46}.100\\%\\approx 52,2\\% \\\\ & \\%{{m}_{H}}=\\dfrac{6}{46}.100\\%\\approx 13\\% \\\\ & \\%{{m}_{O}}=100\\%-52,5\\%=34,8\\% \\\\ \\end{aligned}$<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2343},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" H\u1ee3p ch\u1ea5t c\u00f3 % kh\u1ed1i l\u01b0\u1ee3ng C l\u1edbn nh\u1ea5t l\u00e0:","select":["A. $CH_4$ ","B. $CO_2$","C. $C_2H_6$","D. $CH_3Cl$"],"hint":"","explain":"<span class='basic_left'>$\\begin{aligned} & A.\\%{{m}_{C}}=\\dfrac{12}{16}.100\\%=75\\% \\\\ & B.\\%{{m}_{C}}=\\dfrac{12}{44}.100\\%\\approx 27,3\\% \\\\ & C.\\%{{m}_{C}}=\\dfrac{24}{30}.100\\%=80\\% \\\\ & D.\\%{{m}_{C}}=\\dfrac{12}{50,5}.100\\%\\approx 23,8\\% \\\\ \\end{aligned}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2344},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" \u0110\u1ed1t ch\u00e1y b\u00f4ng, \u00fap \u1ed1ng nghi\u1ec7m ph\u00eda tr\u00ean ng\u1ecdn l\u1eeda, khi \u1ed1ng nghi\u1ec7m m\u1edd \u0111i, xoay l\u1ea1i, r\u00f3t n\u01b0\u1edbc v\u00f4i trong v\u00e0o l\u1eafc \u0111\u1ec1u. Hi\u1ec7n t\u01b0\u1ee3ng quan s\u00e1t \u0111\u01b0\u1ee3c l\u00e0:","select":["A. Kh\u00f4ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng g\u00ec","A. Kh\u00f4ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng g\u00ec","C. Dung d\u1ecbch n\u01b0\u1edbc v\u00f4i trong v\u1ea9n \u0111\u1ee5c","D. Dung d\u1ecbch n\u01b0\u1edbc v\u00f4i trong chuy\u1ec3n \u0111\u1ecf."],"hint":"","explain":"<span class='basic_left'>\u0110\u1ed1t ch\u00e1y b\u00f4ng sinh ra kh\u00ed $CO_2$ l\u00e0m \u0111\u1ee5c n\u01b0\u1edbc v\u00f4i trong: $C{{O}_{2}}+Ca{{(OH)}_{2}}\\to CaC{{O}_{3}}\\downarrow +{{H}_{2}}O$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2345},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" T\u1ec9 kh\u1ed1i c\u1ee7a kh\u00ed X so v\u1edbi $H_2$ l\u00e0 8. Kh\u00ed X l\u00e0:","select":["A. $CO_2$ ","B. $C_2H_4$","C. $CH_4$ ","D. $SO_2$"],"hint":"","explain":"<span class='basic_left'>${{d}_{X\/{{H}_{2}}}}=8\\Rightarrow {{M}_{X}}=8.2=16$ . Ch\u1ec9 c\u00f3 \u0111\u00e1p \u00e1n C th\u1ecfa m\u00e3n<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2346},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" % kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a H trong h\u1ee3p ch\u1ea5t $C_6H_6$ l\u00e0:","select":["A. 5,4%","B. 6,8%","C. 7,7%","D. 9,2%"],"hint":"","explain":"<span class='basic_left'>$\\%{{m}_{H}}=\\dfrac{6}{78}.100\\%\\approx 7,7\\%$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2347},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" Hi\u0111rocacbon A c\u00f3 75% C v\u1ec1 kh\u1ed1i l\u01b0\u1ee3ng. CTPT c\u1ee7a A l\u00e0:","select":["A. $CH_4$ ","B. $C_2H_4$","C. $C_2H_6$","D. $C_3H_8$"],"hint":"","explain":"<span class='basic_left'>T\u00ednh % kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a 4 \u0111\u00e1p \u00e1n ch\u1ec9 c\u00f3 \u0111\u00e1p \u00e1n A th\u1ecfa m\u00e3n $A.\\%{{m}_{C}}=\\dfrac{12}{16}.100\\%=75\\%$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2348},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"M\u1ed9t h\u1ee3p ch\u1ea5t t\u1ea1o b\u1edfi 2 nguy\u00ean t\u1ed1 l\u00e0 C v\u00e0 O. Bi\u1ebft t\u1ec9 l\u1ec7 v\u1ec1 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a C v\u00e0 O l\u00e0 . $\\dfrac{{{m}_{C}}}{{{m}_{O}}}=\\dfrac{3}{8}$ T\u1ec9 l\u1ec7 s\u1ed1 nguy\u00ean t\u1eed C v\u00e0 O trong ph\u00e2n t\u1eed l\u00e0:","select":["A. 1:1 ","B. 2:1","C. 1:2 ","D. 1:3"],"hint":"","explain":"<span class='basic_left'>Gi\u1ea3 s\u1eed c\u00f3 3 gam C => kh\u1ed1i l\u01b0\u1ee3ng oxi l\u00e0 8 gam.<br\/> $\\begin{aligned}& {{n}_{C}}=\\dfrac{3}{12}=0,25\\,mol \\\\ & {{n}_{O}}=\\dfrac{8}{16}=0,5\\,mol\\Rightarrow \\dfrac{{{n}_{C}}}{{{n}_{O}}}=\\dfrac{1}{2} \\\\ \\end{aligned}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2349},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"M\u1ed9t ch\u1ea5t kh\u00ed A c\u00f3 t\u1ec9 kh\u1ed1i so v\u1edbi $H_2$ l\u00e0 14 ch\u1ec9 ch\u1ee9a C v\u00e0 H. Ph\u00e2n t\u1eed c\u00f3 85,7% C v\u1ec1 kh\u1ed1i l\u01b0\u1ee3ng, c\u00f2n l\u1ea1i l\u00e0 H. T\u1ec9 l\u1ec7 s\u1ed1 nguy\u00ean t\u1eed C v\u00e0 H trong ph\u00e2n t\u1eed l\u00e0:","select":["A. 1:1 ","B. 2:1","C. 1:2 ","D. 1:3"],"hint":"","explain":"<span class='basic_left'>${{d}_{A\/{{H}_{2}}}}=14\\Rightarrow {{M}_{A}}=2.14=28$ .<br\/> Gi\u1ea3 s\u1eed c\u00f3 28 gam kh\u00ed A<br\/>$\\begin{aligned} & \\Rightarrow {{m}_{C}}=\\dfrac{85,7\\%.28}{100\\%}=23,996g \\\\ & \\Rightarrow {{n}_{C}}\\approx 2\\,mol \\\\ & {{m}_{H}}=28-23,996=4,004g \\\\ & {{n}_{H}}\\approx 4\\,mol \\\\ & \\Rightarrow \\dfrac{{{n}_{C}}}{{{n}_{H}}}=\\dfrac{1}{2} \\\\ \\end{aligned}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2350}],"lesson":{"save":0,"level":2}}