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{"segment":[{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" Nh\u1eefng ch\u1ea5t ch\u00e1y \u0111\u01b0\u1ee3c, khi ch\u00e1y t\u1ecfa nhi\u1ec7t v\u00e0 ph\u00e1t s\u00e1ng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0:","select":["A. Nguy\u00ean li\u1ec7u ","B. V\u1eadt li\u1ec7u ","C. Nhi\u00ean li\u1ec7u","D. \u0110i\u1ec7n n\u0103ng"],"hint":"","explain":"<span class='basic_left'>Nhi\u00ean li\u1ec7u l\u00e0 nh\u1eefng ch\u1ea5t ch\u00e1y \u0111\u01b0\u1ee3c, khi ch\u00e1y t\u1ecfa nhi\u1ec7t v\u00e0 ph\u00e1t s\u00e1ng<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2451},{"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 v\u00e0o tr\u1ea1ng th\u00e1i, nhi\u00ean li\u1ec7u \u0111\u01b0\u1ee3c chia th\u00e0nh m\u1ea5y lo\u1ea1i","select":["A. 1 ","B. 2 ","C. 3 ","D. 4 "],"hint":"","explain":"<span class='basic_left'>D\u1ef1a v\u00e0o tr\u1ea1ng th\u00e1i, nhi\u00ean li\u1ec7u \u0111\u01b0\u1ee3c chia th\u00e0nh 3 lo\u1ea1i: nhi\u00ean li\u1ec7u r\u1eafn, l\u1ecfng, kh\u00ed<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2452},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" Lo\u1ea1i nhi\u00ean li\u1ec7u c\u00f3 n\u0103ng su\u1ea5t t\u1ecfa nhi\u1ec7t cao, d\u1ec5 ch\u00e1y ho\u00e0n to\u00e0n, \u00edt g\u00e2y \u0111\u1ed9c h\u1ea1i cho m\u00f4i tr\u01b0\u1eddng l\u00e0","select":["A. Nhi\u00ean li\u1ec7u r\u1eafn","B. Nhi\u00ean li\u1ec7u l\u1ecfng ","C. Nhi\u00ean li\u1ec7u kh\u00ed","D. Kh\u00f4ng c\u00f3 lo\u1ea1i nhi\u00ean li\u1ec7u \u0111\u00f3"],"hint":"","explain":"<span class='basic_left'>Nhi\u00ean li\u1ec7u kh\u00ed c\u00f3 n\u0103ng su\u1ea5t t\u1ecfa nhi\u1ec7t cao, d\u1ec5 ch\u00e1y ho\u00e0n to\u00e0n, \u00edt g\u00e2y \u0111\u1ed9c h\u1ea1i cho m\u00f4i tr\u01b0\u1eddng<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2453},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Lo\u1ea1i than \u0111\u01b0\u1ee3c d\u00f9ng ch\u1ee7 y\u1ebfu l\u00e0m ch\u1ea5t \u0111\u1ed1t t\u1ea1i ch\u1ed7 v\u00e0 l\u00e0m ph\u00e2n b\u00f3n l\u00e0:","select":["A. Than g\u1ea7y ","B. Than m\u1ee1 ","C. Than b\u00f9n ","D. Than non "],"hint":"","explain":"<span class='basic_left'>Than b\u00f9n l\u00e0 lo\u1ea1i than tr\u1ebb nh\u1ea5t \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh \u1edf \u0111\u00e1y c\u00e1c \u0111\u1ea7m l\u1ea7y, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m ch\u1ea5t \u0111\u1ed1t t\u1ea1i ch\u1ed7 v\u00e0 l\u00e0m ph\u00e2n b\u00f3n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2454},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" Trong c\u00e1c lo\u1ea1i than d\u01b0\u1edbi \u0111\u00e2y, lo\u1ea1i than gi\u00e0 nh\u1ea5t c\u00f3 h\u00e0m l\u01b0\u1ee3ng cacbon tr\u00ean 90% l\u00e0:","select":["A. Than g\u1ea7y ","B. Than m\u1ee1 ","C. Than b\u00f9n ","D. Than non "],"hint":"","explain":"<span class='basic_left'>Than g\u1ea7y l\u00e0 lo\u1ea1i than gi\u00e0 nh\u1ea5t, ch\u1ee9a tr\u00ean 90% h\u00e0m l\u01b0\u1ee3ng cacbon.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2455},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" Ng\u01b0\u1eddi ta \u0111ang nghi\u00ean c\u1ee9u \u0111\u1ec3 s\u1eed d\u1ee5ng ngu\u1ed3n nhi\u00ean li\u1ec7u khi ch\u00e1y kh\u00f4ng g\u00e2y \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng l\u00e0 ","select":["A. $CH_4$. ","B. $H_2$.","C. $C_4H_10$. ","D. $CO$."],"hint":"","explain":"<span class='basic_left'>$H_2$ \u0111ang l\u00e0 ngu\u1ed3n nhi\u00ean li\u1ec7u \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u l\u00e0m ngu\u1ed3n nhi\u00ean li\u1ec7u khi ch\u00e1y kh\u00f4ng g\u00e2y \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2456},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" Trong c\u00e1c lo\u1ea1i than d\u01b0\u1edbi \u0111\u00e2y, lo\u1ea1i than tr\u1ebb nh\u1ea5t c\u00f3 h\u00e0m l\u01b0\u1ee3ng cacbon th\u1ea5p nh\u1ea5t l\u00e0 ","select":["A. Than g\u1ea7y ","B. Than m\u1ee1 ","C. Than b\u00f9n ","D. Than non "],"hint":"","explain":"<span class='basic_left'>Than b\u00f9n l\u00e0 lo\u1ea1i than tr\u1ebb nh\u1ea5t \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh \u1edf \u0111\u00e1y c\u00e1c \u0111\u1ea7m l\u1ea7y<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2457},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" Th\u00e0nh ph\u1ea7n ch\u00ednh trong b\u00ecnh kh\u00ed biogas l\u00e0 ","select":["A. $C_2H_2$.","B. $CH_4$. ","C. $C_2H_4$.","D. $C_2H_4O$."],"hint":"","explain":"<span class='basic_left'> Metan l\u00e0 kh\u00ed ch\u00ednh trong b\u00ecnh kh\u00ed biogas.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2458},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" Nhi\u00ean li\u1ec7u n\u00e0o d\u00f9ng trong \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y sau \u0111\u00e2y \u0111\u01b0\u1ee3c coi l\u00e0 s\u1ea1ch h\u01a1n c\u1ea3?","select":["A. D\u1ea7u h\u1ecfa","B. Than","C. C\u1ee7i ","D. Kh\u00ed (gas)"],"hint":"","explain":"<span class='basic_left'>Kh\u00ed (gas) \u0111\u01b0\u1ee3c coi l\u00e0 s\u1ea1ch h\u01a1n c\u1ea3 v\u00ec n\u0103ng su\u1ea5t t\u1ecfa nhi\u1ec7t cao, d\u1ec5 ch\u00e1y ho\u00e0n to\u00e0n, \u00edt g\u00e2y \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2459},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" \u1ee8ng d\u1ee5ng ch\u1ee7 y\u1ebfu c\u1ee7a than m\u1ee1 l\u00e0:","select":["A. D\u00f9ng l\u00e0m nhi\u00ean li\u1ec7u cho c\u00f4ng nghi\u1ec7p","B. D\u00f9ng \u0111\u1ec3 luy\u1ec7n than c\u1ed1c","C. D\u00f9ng l\u00e0m ch\u1ea5t \u0111\u1ed1t t\u1ea1i ch\u1ed7 v\u00e0 l\u00e0m ph\u00e2n b\u00f3n","D. C\u1ea3 3 \u00fd tr\u00ean \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>\u1ee8ng d\u1ee5ng ch\u1ee7 y\u1ebfu c\u1ee7a than m\u1ee1 l\u00e0 d\u00f9ng luy\u1ec7n than c\u1ed1c<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2460},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" X\u0103ng sinh h\u1ecdc E5 ch\u1ee9a l\u1ea7n l\u01b0\u1ee3t bao nhi\u00eau % th\u1ec3 t\u00edch c\u1ed3n v\u00e0 x\u0103ng truy\u1ec1n th\u1ed1ng","select":["A. 10% v\u00e0 90% ","B. 12% v\u00e0 88% ","C. 5% v\u00e0 95%","D. 3% v\u00e0 98%"],"hint":"","explain":"<span class='basic_left'>X\u0103ng sinh h\u1ecdc E5 ch\u1ee9a 5% v\u00e0 95%<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2461},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" L\u01b0\u1ee3ng kh\u00ed $CO_2$ sinh ra khi \u0111\u1ed1t ch\u00e1y ho\u00e0n to\u00e0n l\u01b0\u1ee3ng than ch\u1ee9a 1kg than l\u00e0:","select":["A. 1,6 $m^3$ ","B. 1,76 $m^3$","C. 1,87 $m^3$","D. 1,91 $m^3$ "],"hint":"","explain":"<span class='basic_left'>$\\begin{aligned} & {{n}_{C}}=\\dfrac{1.1000}{12}\\approx 83,3\\,mol \\\\ & C+{{O}_{2}}\\xrightarrow{{{t}^{0}}}C{{O}_{2}} \\\\ & {{n}_{{{O}_{2}}}}={{n}_{C{{O}_{2}}}}=83,3.22,4=1865,92\\,L\\approx 1,87\\,{{m}^{3}} \\\\ \\end{aligned}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2462},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" Khi \u0111\u1ed1t kh\u00ed $H_2$ v\u1edbi $O_2$ s\u1ebd g\u00e2y n\u1ed5. \u0110\u1ec3 h\u1ed7n h\u1ee3p n\u1ed5 m\u1ea1nh nh\u1ea5t th\u00ec t\u1ec9 l\u1ec7 th\u1ec3 t\u00edch gi\u1eefa kh\u00ed $H_2$ v\u1edbi $O_2$ l\u00e0 ","select":["A. 2 : 1","B. 1 : 2.","C. 1 : 1. ","D. 3 : 1"],"hint":"","explain":"<span class='basic_left'>$2{{H}_{2}}+{{O}_{2}}\\xrightarrow{{{t}^{0}}}2{{H}_{2}}O$ . <br\/>T\u1ec9 l\u1ec7 th\u1ec3 t\u00edch gi\u1eefa $H_2$ v\u1edbi $O_2$ l\u00e0 2 : 1 th\u00ec h\u1ed7n h\u1ee3p n\u1ed5 s\u1ebd m\u1ea1nh nh\u1ea5t.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2463},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 s\u1eed d\u1ee5ng nhi\u00ean li\u1ec7u hi\u1ec7u qu\u1ea3","select":["A. Cung c\u1ea5p \u0111\u1ee7 oxi ho\u1eb7c kh\u00f4ng kh\u00ed cho s\u1ef1 ch\u00e1y","B. T\u0103ng di\u1ec7n t\u00edch ti\u1ebfp x\u00fac c\u1ee7a nhi\u00ean li\u1ec7u v\u1edbi kh\u00f4ng kh\u00ed","C. \u0110i\u1ec1u ch\u1ec9nh l\u01b0\u1ee3ng nhi\u00ean li\u1ec7u \u0111\u1ec3 duy tr\u00ec s\u1ef1 ch\u00e1y \u1edf m\u1ee9c \u0111\u1ed9 c\u1ea7n thi\u1ebft ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u s\u1eed d\u1ee5ng","D. C\u1ea3 3 \u00fd tr\u00ean \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>\u0110\u1ec3 s\u1eed d\u1ee5ng nhi\u00ean li\u1ec7u hi\u1ec7u qu\u1ea3 c\u1ea7n: <br\/> Cung c\u1ea5p \u0111\u1ee7 oxi ho\u1eb7c kh\u00f4ng kh\u00ed cho s\u1ef1 ch\u00e1y.<br\/>T\u0103ng di\u1ec7n t\u00edch ti\u1ebfp x\u00fac c\u1ee7a nhi\u00ean li\u1ec7u v\u1edbi kh\u00f4ng kh\u00ed.<br\/> \u0110i\u1ec1u ch\u1ec9nh l\u01b0\u1ee3ng nhi\u00ean li\u1ec7u \u0111\u1ec3 duy tr\u00ec s\u1ef1 ch\u00e1y \u1edf m\u1ee9c \u0111\u1ed9 c\u1ea7n thi\u1ebft ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u s\u1eed d\u1ee5ng<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2464},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" L\u01b0\u1ee3ng nhi\u1ec7t t\u1ecfa ra khi \u0111\u1ed1t ch\u00e1y ho\u00e0n to\u00e0n 3kg than ch\u1ee9a 90% h\u00e0m l\u01b0\u1ee3ng C v\u00e0 10% c\u00e1c h\u1ee3p ch\u1ea5t kh\u00f4ng ch\u00e1y l\u00e0: (Bi\u1ebft r\u1eb1ng khi \u0111\u1ed1t 1 mol cacbon ch\u00e1y t\u1ecfa ra 394 kj nhi\u1ec7t l\u01b0\u1ee3ng)","select":["A. 98500 kj","B. 92590 kj","C. 88650 kj ","D. 86680 kj "],"hint":"","explain":"<span class='basic_left'>$\\begin{aligned} & {{m}_{C}}=\\dfrac{3.90\\%}{100\\%}=2,7\\,kg \\\\ & {{n}_{C}}=\\dfrac{2,7.1000}{12}=22\\,5mol \\\\ \\end{aligned}$ .<br\/> V\u1eady l\u01b0\u1ee3ng nhi\u1ec7t t\u1ecfa ra l\u00e0: $225.394=88650 kj$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2465},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" Th\u1ec3 t\u00edch kh\u00ed oxi (\u1edf \u0111ktc) c\u1ea7n d\u00f9ng \u0111\u1ec3 \u0111\u1ed1t ch\u00e1y ho\u00e0n to\u00e0n 5 kg than c\u00f3 ch\u1ee9a 4% t\u1ea1p ch\u1ea5t kh\u00f4ng ch\u00e1y l\u00e0 ","select":["A. 8,96 $m^3$.","B. 4,48 $m^3$.","C. 9,33 $m^3$. ","D. 6,72 $m^3$."],"hint":"","explain":"<span class='basic_left'>$\\begin{aligned} & {{m}_{C}}=\\dfrac{5.96\\%}{100\\%}=4,8\\,kg=4800\\,gam \\\\ & {{n}_{C}}=400\\,mol \\\\ & C+{{O}_{2}}\\xrightarrow{{{t}^{0}}}C{{O}_{2}} \\\\ & {{n}_{{{O}_{2}}}}={{n}_{C}}=400\\,mol \\\\ & {{V}_{{{O}_{2}}}}=8960\\,L=8,96\\,{{m}^{3}} \\\\ \\end{aligned}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2466},{"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 ho\u00e0n to\u00e0n 6 kg than th\u00ec c\u1ea7n v\u1eeba \u0111\u1ee7 8,96 $m^3$. oxi (\u1edf \u0111ktc). Th\u00e0nh ph\u1ea7n ph\u1ea7n tr\u0103m kh\u1ed1i l\u01b0\u1ee3ng cacbon c\u00f3 trong than l\u00e0 ","select":["A. 9,6%. ","B. 96%.","C. 80%.","D. 8%."],"hint":"","explain":"<span class='basic_left'>$\\begin{aligned} & {{n}_{{{O}_{2}}}}=\\dfrac{8,96.1000}{22,4}=400\\,mol \\\\ & C+{{O}_{2}}\\xrightarrow{{{t}^{0}}}C{{O}_{2}} \\\\ & {{n}_{C}}={{n}_{{{O}_{2}}}}=400\\,mol \\\\ & {{m}_{C}}=4800\\,gam=4,8\\,kg \\\\ & \\%{{m}_{C}}=\\dfrac{4,8}{6}.100\\%=80\\% \\\\ \\end{aligned}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2467},{"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 ho\u00e0n to\u00e0n 3 kg than c\u00f3 ch\u1ee9a 20% t\u1ea1p ch\u1ea5t kh\u00f4ng ch\u00e1y, r\u1ed3i d\u1eabn to\u00e0n b\u1ed9 s\u1ea3n ph\u1ea9m cho qua dung d\u1ecbch n\u01b0\u1edbc v\u00f4i trong d\u01b0. Kh\u1ed1i l\u01b0\u1ee3ng k\u1ebft t\u1ee7a thu \u0111\u01b0\u1ee3c l\u00e0 ","select":["A. 10 kg. ","B. 20 kg.","C. 25 kg. ","D. 40 kg."],"hint":"","explain":"<span class='basic_left'>$\\begin{aligned} & {{m}_{C}}=\\dfrac{3.80\\%}{100\\%}=2,4\\,kg=2400\\,gam \\\\ & {{n}_{C}}=200\\,mol \\\\ & C+{{O}_{2}}\\xrightarrow{{{t}^{0}}}C{{O}_{2}} \\\\ & C{{O}_{2}}+Ca{{(OH)}_{2}}\\to CaC{{O}_{3}}\\downarrow +{{H}_{2}}O \\\\ & {{n}_{\\downarrow }}={{n}_{C{{O}_{2}}}}={{n}_{C}}=200\\,mol \\\\ & {{m}_{\\downarrow }}=200.100=20000\\,gam=20kg \\\\ \\end{aligned}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2468},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" \u0110\u1ed1t ho\u00e0n to\u00e0n 6 kg than c\u00f3 ch\u1ee9a 2% t\u1ea1p ch\u1ea5t l\u01b0u hu\u1ef3nh v\u00e0 3% t\u1ea1p ch\u1ea5t kh\u00f4ng ch\u00e1y, c\u00f2n l\u1ea1i l\u00e0 C th\u00ec th\u1ec3 t\u00edch oxi (\u1edf \u0111ktc) c\u1ea7n d\u00f9ng l\u00e0 ","select":["A. 10,724 $m^3$.","B. 10,640 $m^3$.","C. 4,7845 $m^3$. ","D. 8,50 $m^3$."],"hint":"","explain":"<span class='basic_left'>$\\begin{aligned} & {{m}_{C}}=\\dfrac{6.95\\%}{100\\%}=5,7\\,kg=5700\\,gam\\Rightarrow {{n}_{C}}=475\\,mol \\\\ & {{m}_{S}}=\\dfrac{6.2\\%}{100\\%}=0,12\\,kg=120\\,gam\\Rightarrow {{n}_{S}}=3,75\\,mol \\\\ & C+{{O}_{2}}\\xrightarrow{{{t}^{0}}}C{{O}_{2}} \\\\ & S+{{O}_{2}}\\xrightarrow{{{t}^{0}}}S{{O}_{2}} \\\\ & {{n}_{{{O}_{2}}}}={{n}_{C}}+{{n}_{S}}=475+3,75=478,75\\,mol \\\\ & {{V}_{{{O}_{2}}}}=10724\\,L=10,724\\,{{m}^{3}} \\\\ \\end{aligned}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2469},{"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 ho\u00e0n to\u00e0n 24 gam than ch\u1ee9a 98% cacbon. Nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra l\u00e0 (Bi\u1ebft r\u1eb1ng khi \u0111\u1ed1t 1 mol cacbon ch\u00e1y t\u1ecfa ra 394 kj nhi\u1ec7t l\u01b0\u1ee3ng) ","select":["A. 788 kj.","B. 772,24 kj.","C. 1576 kj.","D. 896 kj"],"hint":"","explain":"<span class='basic_left'>$\\begin{aligned} & {{m}_{C}}=\\dfrac{24.98\\%}{100\\%}=23,52\\,gam \\\\ & {{n}_{C}}=1,96\\,mol \\\\ \\end{aligned}$ <br\/> V\u1eady l\u01b0\u1ee3ng nhi\u1ec7t t\u1ecfa ra l\u00e0: $1,96.394=772,24\\,kj$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2470}],"lesson":{"save":0,"level":2}}

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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)

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