Chọn đáp án C

A không có mùi đặc trưng : Loại B ngay

A cháy trong O₂: Loại A ngay

A cháy trong O₂ tạo khí không màu (Loại D)

Chọn đáp án C

A không có mùi đặc trưng : Loại B ngay

A cháy trong O₂: Loại A ngay

A cháy trong O₂ tạo khí không màu (Loại D)

Chú ý : Li tác dụng với N₂ ở nhiệt độ thường

a) Gọi số mol của FeCO₃: x (mol) ;

số mol của FeS₂: y (mol)

4FeCO₃ + O₂ → Fe₂O₃ + 4CO₂↑

x         → 0,25x             → x        (mol)

4FeS₂ +11O₂ → 2Fe₂O₃ + 8SO₂↑

y       → 2,75y             → 2y        (mol)

∑ n_O2 = 0,25x + 2,75y (mol)

Cùng điều kiện về nhiệt độ và áp suất nên tỉ lệ về thể tích = tỉ lệ về số mol

=> n_N2 = 4n_O2 = 4(0,25x + 2,75y)

=> n_N2 = x + 11y (mol)

Vậy hỗn hợp Y gồm:

Khối lượng Fe có trong Z là:

Vì H = 80% => n_Fe2O3 (trong X) = 0,12. 100% : 80% = 0,15 (mol)

n_{Fe2O3 dư (trong Z)} = 0,15 – 0,12 = 0,03 (mol)

Khối lượng tạp chất trong Z = 27,96 – m_Fe – m_{Fe2O3 dư} = 27,96 – 0,24.56 – 0,03.160 = 9,72 (g)

Bảo toàn nguyên tố Fe => n_FeCO3 + n_FeS2 = 2n_{Fe2O3(trong X)}

=> x + y = 0,3 (2)

Từ (1) và (2) => x = 0,18 và y = 0,12 (mol)

Áp dụng công thức PV = nRT  ( với n = n_CO2 + n_SO2 + n_N2 = 0,18 + 2. 0,12 + 0,18 +11.0,12 = 1,92)

=> P.10 = 1,92.0,082. (136,5 +273)

=> P = 6,447 ( atm) ≈ 6,5 (atm)

Ta có: m_A = m_FeCO3 + m_FeS2 + m_{tạp chất} = 0,18.116 + 0,12.120 + 9,72 = 45 (g)

b) hỗn hợp Y gồm:

Cho hỗn hợp Y qua O₂ ( xúc tác V₂O₅ ) có phản ứng sau:

Khối lượng dd sau: m_{dd sau}  = m_SO3 + m_H2O = 0,24. 80 + 592,8 = 612 (g)

2KMnO₄-to>K₂MnO₄+MnO₂+O₂

0,14-------------0,07------0,07-------0,07 mol

n KMnO4=\(\dfrac{22,12}{158}\)=0,14 mol

=>a=mcr=0,07.197+0,07.87=23,82g

=>VO2=0,07.22,4=1,568l

b)

2Cu+O₂-to>2CuO

          0,07-----0,14

n Cu=\(\dfrac{10,24}{64}\)=0,16 mol

Cu dư :0,01 mol

m chất rắn =0,01.64+0,14.80=11,84g

Đáp án cần chọn là: A

Đáp án cần chọn là: A

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cyllysylthreonylalanylthreonylseryllysylarginylalanylalanylprolylvalylisutamylprolylleucylglutamylvalylalanylllphenylalanylthreonylcysteinylglutamyllasparaginylvalylarginylphenylalanylglalanylglycylarginylglutamylisoleucyltyeinylserylisoleucylarginylserylseryllyglutamylisoleucylleucylarginylthreonylylglycylglutamyltyrosylthreonylcysteinyltyrosylglycylserylvalylserylcysteinyylvalylthreonylvalylprolylglycylglycylleucylleucylprolylglutamylarginyllysylutamylvalylvalylleucyllysylserylvalyllmylglutamylglutamylglutamylprolyllysylglutamyllysylvalyllysyllysylprolylalanolylprolyllysylprolylvalylglutamylglutlvalylthreonyllysylarginylglutamylargiylthreonyllysylvalylprolylglutamylisolylleucylprolylalanylprolylglutamylprolnylglutamylvalyllysylthreonylisoleucyllprolylglutamylprolylthreonylprolylisoylvalylprolylvalylvalylglycyllysyllysylyllysylglutamylglutamylalanylalanyllylysylglycylvalylprolyllysyllysylthreonlalanylglutamylarginylarginyllysylleuccylglutamyllysylprolylprolylaspartylglnyltyrosylglutaminylleucyllysylalanylvlyllysylglutamylisoleucyllysylaspartyltamylserylglutamylphenylalanylvalylglylanylglutamylcysteinylleucylvalylserylhreonylthreonyltryptophylmethionyllysyeucylarginylglutamylserylprolyllysylhilanylaspartylglycyllysylaspartylarginycylaspartylvalylglutaminylleucylserylahreonylcysteinylvalylleucylarginylleucylthreonylserylthreonylalanyllysylleucrolylvalylarginylphenylalanylvalyllysyamylvalylthreonylvalylvalyllysylglycylserylcysteinylglutamylleucylasparaginyalyltryptophylarginyllysylaspartylglycysylprolylglycylarginylisoleucylvalylpylmethionylarginylalanylleucylthreonylspartylaspartylthreonylaspartylalanylgreonylvalylglutamylasparaginylalanylasysteinylserylserylcysteinylvalyllysylvnylaspartyltryptophylleucylvalyllysylpinylhistidylvalyllysylprolyllysylglycylalanylcysteinylaspartylisoleucylalanyinylisoleucyllysyltryptophylphenylalanlisoleucylprolylalanylglutamylprolylasmylisoleucylleucylarginylaspartylglycyucyllysylisoleucyllysylasparaginylalanoleucylalanylglutamyltyrosylalanylvalyylarginyltyrosylprolylalanyllysylleucylglutamylvalylglutamylleucylleucyllysyylthreonylisoleucyltyrosylglutamyllysyylaspartylalanylglutamylisoleucylserylylglycylglutaminyltryptophyllysylleucyinylprolylserylprolylthreonylcysteinyllglycylglycyllysylarginylphenylalanyllyllysylleucylaspartylglutaminylalanylgaminylalanylleucylasparaginylalanylisoylleucylthreonylvalyllysylglutamylisolanylalanylvalylprolylleucyllysylaspartrginylarginylglutaminylalanylarginylphcylthreonylarginylglutamylalanylasparaysylglycylprolylaspartylisoleucylisolenylalanylaspartylisoleucylisoleucylalaisoleucylleucylvalylisoleucylasparaginylaspartylaspartylglutamylglycylvalyltutamylglycyllysyllysylthreonylserylalareonylglycylisoleucylarginylleucyllysyucylglutamylaspartylglutaminylthreonyleonylalanylthreonylphenylalanylvalylcylutamyllysylmethionylhistidylvalylvalyinylaspartylalanyllysylleucylhistidyltcylisoleucylserylserylglutamylglycyllymylmethionyllysylglutamylvalylthreonyllglutaminylisoleucyllysylalanylglutamiylthreonylalanylglutaminylleucyllysylvlyltyrosylphenylalanylthreonylvalyllysylalanylvalylglutamyllysylaspartylglutteinylglutamylvalylseryllysylaspartylvlalanyllysylaspartylglycylglutamylglutlysyltyrosylserylisoleucyllysylalanylaoleucylleucyllysylisoleucyllysyllysylaylglycylglutamyltyrosylvalylcysteinylatyllysylthreonyllysylalanylasparaginylinylleucylisoleucylglutamylvalylglutamylglutamylvalylphenylalanylvalylglycyllalanylglutamylisoleucylglutamylleucyltidylglycylglutaminyltryptophyllysylleylthreonylalanylserylprolylaspartylcystamylaspartylglycyllysyllysylhistidyliylasparaginylcysteinylglutaminylleucylylvalylserylphenylalanylglutaminylalanalanylalanylasparaginylleucyllysylvalyleucylphenylalanylisoleucylthreonylproylphenylalanylglutamyllysylaspartylglulcysteinylglutamylvalylserylarginylglularginyltryptophylleucyllysylglycylthreonylglycylaspartylaspartylarginylphenlaspartylglycylthreonyllysylhistidylselalanylalanylphenylalanylglutamylasparnylphenylalanylglutamylalanylglutamylaycyllysylleucylisoleucylisoleucylglutalphenylalanylleucylthreonylprolylleucysylglutamyllysylglutamylserylalanylvalleucylserylhistidylaspartylasparaginyllphenylalanyllysylasparaginylaspartylgnylthreonylarginylserylvalylserylmethillysylthreonylhistidylserylisoleucylthylserylisoleucylaspartylaspartylthreonlylglutamylalanylmethionylglycylmethiocylthreonylvalylleucylglutamylglycylasonylglycyllysylleucylglutaminylaspartylysylaspartylglutamylvalylisoleucylleuucylseryllysylalanylaspartylalanylprolysylaspartylglycyllysylglutamylisoleuclanylvalylisoleucyllysylthreonylasparteucylisoleucylleucyllysyllysylalanylleylglutaminyltyrosylthreonylcysteinylasyllysylthreonylserylglycyllysylleucylainylglutamylisoleucyllysylleucylvalylalglutamylvalylmethionylglutamylthreonylalanylglutamylthreonylglutamylisoleuceucylhistidylalanylasparaginyltryptophnylleucylleucylglutaminylthreonylprolylysylglutamylglutamylglycyllysylisoleustidylasparaginylcysteinylarginylleucyycylvalylaspartylphenylalanylglutaminyerylserylalanylhistidylleucylarginylvaglycylleucylleucylarginylprolylleucyllnylalanylglycylglutamylthreonylalanyltlglutamylleucylseryltyrosylglutamylaspyptophyltyrosylleucyllysylglycyllysyllyllysylvalylvalylprolylarginylserylgluylleucylthreonylleucylarginylaspartylvylglycylglutamylvalylglutaminylleucyltnyllysylthreonylhistidylalanylasparagiamylprolylprolylvalylglutamylphenylalalaspartylglutaminylthreonylvalylglutamlvalylleucylglutamylcysteinylglutamylvalanyllysylvalyllysyltryptophylphenylaglutamylisoleucylleucyllysylseryllysyllanylaspartylglycylarginylvalylarginylpartylcysteinylthreonylprolylglutamylalthreonylcysteinylaspartylalanyllysylaylcysteinylasparaginylleucylasparaginylglutamylphenylalanylleucylarginylprolminylvalylarginylglutamyllysylglutamyllutamylcysteinylglutamylleucylserylargalyllysyltryptophylphenylalanyllysylaslysyllysylglycyllysyllysyltyrosylasparylalanylvalylarginylisoleucylleucylvallleucylleucylaspartylaspartylglutamylalutamylvalylarginylthreonylalanylarginlthreonylvalylleucylglutamylglutamylglyllysylasparaginylleucylalanylasparagimylthreonylaspartylthreonylisoleucyllylseryllysylprolylglycylalanylglutamylvglycylaspartylglutamylglutamylisoleucyinyltyrosylglutamylisoleucylleucylthreylisoleucylleucylvalylisoleucylglutamilutamylaspartylalanylglycylasparaginyleucylprolylserylserylarginylthreonylastidylglutamylleucylalanylalanylglutamylylglutaminylasparaginylleucylglutamylyllysylalanylglutamylphenylalanylvalylutamylserylphenylalanylprolylvalylglutlaspartyllysylthreonylleucylglutamylseylvalylisoleucylalanylaspartylglycyllyllysylaspartylalanylthreonylleucylglutyltyrosylvalylvalylmethionylvalylglycynylhistidylleucylthreonylvalylisoleucylvalylvalylprolylleucyllysylaspartylthaminylglutaminylglutamylvalylvalylphenlvalylasparaginylthreonylglutamylglycyenylalanylarginylasparaginylglutamylglpartylserylseryllysyltyrosylisoleucyliylleucylvalyltyrosylthreonylleucylargistidylleucylaspartylaspartylglutaminylvalylserylleucylthreonylasparaginylhisylvalyllysylserylalanylalanylasparaginmylglutamylaspartylleucylarginylisoleupartylisoleucylglutamylthreonylmethionnylphenylalanyltryptophylcysteinyllysyaginylvalylthreonylleucyllysyltryptophtamylglutamylvalylprolylphenylalanylasyrosylarginylvalylaspartyllysyltyrosyllisoleucyllysylaspartylcysteinylglycyllycylglutamyltyrosylisoleucylvalylthreysylserylvalylalanylglutamylleucylleucrolylthreonylglutamylphenylalanylvalyltylglutaminylthreonylvalylthreonylglutnylvalylphenylalanylserylcysteinylglutylalanylasparaginylvalyllysyltryptophyinylglutamylisoleucyllysylglutamylglyclglutamyllysylaspartylglycylserylisolesoleucyllysylaspartylcysteinylarginyllnylglutamyltyrosylalanylcysteinylglycyerylarginylalanylarginylleucylphenylalrolylvalylglutamylisoleucylisoleucylarisoleucylleucylglutamylalanylprolylglyanylleucylalanylglutamylleucylasparagialylglutaminyltryptophylleucylarginylavalylvalylglutaminylglycylaspartyllysyylserylglutamylglycyllysylisoleucylhisylcysteinylaspartylisoleucyllysylprolytamyltyrosylarginylphenylalanylisoleuclanylarginylalanyllysylleucylglutamyllsoleucyllysylthreonylalanylaspartylglurtylvalylglycyllysylprolylleucylthreonspartylalanyltyrosylprolyllysylalanylgylalanyllysylglutamylasparaginylglutameonylisoleucylaspartylthreonylthreonylylphenylalanylarginylisoleucylleucylglllysylglycylarginyltyrosyllysylisoleucysylhistidylglycyllysylalanylglutamylgylleucyllysylvalylisoleucylaspartylvalaraginylleucylglutamylvalylthreonylgluycylglutamylvalylserylleucylalanyltryphreonylaspartylglycylglycylseryllysylivalylglutamylarginylarginylaspartylisotophylvalylleucylalanylthreonylaspartylglutamylphenylalanylthreonylvalylthreylglycylvalylglutamyltyrosylleucylphennylasparaginylarginylvalylglycylthreonthreonylaspartylasparaginylprolylvalylsylaspartylvalylprolylglycylprolylprolleucylthreonylaspartylvalylasparaginylleucylthreonyltryptophylglutamylprolylglycylalanylglutamylisoleucylthreonylaamylleucylarginylaspartyllysylthreonylrtylthreonylalanylmethionylthreonylvalylserylalanylthreonylvalylthreonylaspanylglutamyltyrosylserylphenylalanylargaraginylarginylisoleucylglycylvalylglyonylprolylphenylalanylvalyllysylvalylalarginylprolylserylprolylprolylvalylaspartylglutaminylthreonylglutaminylseryptophylglutamylprolylprolylleucyllysyleucylleucylglycyltyrosylisoleucylisolelglutamylglycyllysylaspartylasparaginylasparaginylmethionyllysylleucylvalylpysylvalylthreonylglycylleucylglutamyllucyltyrosylarginylvalylserylalanylglutylserylaspartylprolylserylglutamylisolylalanylaspartylaspartylalanylphenylalionylaspartylleucylserylalanylphenylalylvalylisoleucylvalylprolylasparaginylcylvalylprolylserylthreonylglycyltyrosthreonyltryptophylcysteinylphenylalanyamylthreonylglycylaspartylarginylvalylrylalanyltyrosylalanylglutamylleucylvalarginylserylaspartyllysylglycylisoleuglutamylasparaginylarginylvalyllysylthsoleucylaspartylvalylasparaginylvalylinylprolyllysylglutamylleucyllysylphenynyllysylaspartylserylvalylhistidylleucrolylaspartylaspartylaspartylglycylglyyrosylvalylvalylglutamyllysylarginylglltryptophylthreonyllysylvalylmethionylpartylleucylglutamylphenylalanylthreontaminylglycyllysylglutamyltyrosylleucynylarginylasparaginyllysylcysteinylglytyrosylvalylaspartylglutamylprolylvalyrolylalanylthreonylvalylprolylaspartylllysyltryptophylarginylaspartylarginylucylphenylalanylleucylthreonyltryptophnylaspartylglycylglycylserylarginylisolylglutamylarginylcysteinylprolylarginlvalylalanylcysteinylglycylglutamylpromethionylglutamylvalylthreonylglycylletophyltyrosylalanyltyrosylarginylvalylylglutaminylglycylalanylseryllysylprollglutamylisoleucylglutaminylalanylvalyalanylprolylglutamylisoleucylphenylalaucylalanylglycylleucylthreonylvalyllyslglutamylleucylprolylalanylthreonylvalprolyllysylisoleucylthreonyltryptophyllisoleucylleucyllysylglutaminylaspartyucylglutamylasparaginylvalylprolyllysyleucylvalylaspartylseryllysylarginylserosylisoleucylisoleucylglutamylalanylvarginylalanylthreonylalanylvalylvalylgspartyllysylprolylglycylprolylprolylalucylthreonylaspartylvalylthreonylaspareucylthreonyltryptophylasparaginylprolylglycylseryllysylisoleucylthreonylaspginylarginylalanylthreonylaspartylseryylleucylserylserylthreonylvalyllysylasyllysylalanylthreonyllysylleucylisoleurosylisoleucylphenylalanylarginylvalylionyltyrosylglycylalanylglycylglutamyllylisoleucylthreonylalanyllysyltyrosyllprolylglycylprolylprolylthreonylarginisoleucylthreonyllysylaspartylalanylvacysteinylglutamylprolylaspartylaspartyleucylthreonylglycyltyrosyltryptophylvolylaspartylthreonylaspartyllysyltryptyllysylmethionylprolylvalyllysylaspartyllysylglycylleucylthreonylasparaginylalanylarginylvalylleucylalanylglutamylglycyllysylprolylseryllysylserylthreoneucyllysylaspartylprolylisoleucylasparylglycyllysylprolylthreonylvalyllysylalvalylarginylleucylasparaginyltryptophylaspartylglycylglycylalanyllysylisolecylglutamylmethionylleucyllysylthreonytophylvalylarginylvalylalanylglutamylgtaminylhistidylleucylleucylprolylglycyminylglutamyltyrosylserylphenylalanylaginyllysylalanylglycylglutamylserylgluaspartylprolylvalylleucylcysteinylargiprolylserylprolylprolylarginyltryptophaginylisoleucylthreonyllysylasparaginyryptophylthreonylvalylprolylglutamyllysoleucylthreonylasparaginyltyrosylisoltylvalylarginylarginyllysylglycyltryptlthreonylthreonylvalyllysylaspartylthreonylprolylleucylthreonylglutamylglycylarginylvalylalanylalanylglutamylasparylserylaspartyltyrosylthreonylglutamylleucylalanyllysylaspartylthreonylphenyprolylprolyltyrosylalanylleucylalanylvarginylhistidylvalylaspartylleucyllysylasparaginylaspartylglycylglycylarginyrosylvalylisoleucylglutamyllysyllysylgrginyltryptophylvalyllysylalanylglycylrtylcysteinylasparaginylphenylalanylareucylglutamylglycylthreonylglutamylvalalylarginylalanylglutamylasparaginylglylprolylserylglutamylprolylthreonylglulutamylaspartylprolylthreonylserylprolrtylleucylhistidylvalylthreonylaspartyoleucylalanylisoleucylalanyltryptophylaginylglycylglycylserylprolylisoleucylglutamylmethionylcysteinylprolylvalylglmethionylarginylvalylasparaginylserylleucyllysylphenylalanyllysylvalylglutapartyllysylglutamyltyrosylvalylleucylaginylalanylisoleucylglycylvalylserylglerylglutamylasparaginylvalylvalylalanyyllysylprolylthreonylisoleucylaspartyltylisoleucylisoleucylvalylisoleucylgluisoleucylprolylvalylprolylphenylalanylthreonylvalylseryltryptophylhistidyllylysylalanylserylaspartylarginylleucyltartylhistidylisoleucylserylalanylhistirylvalylarginylalanylaspartylalanylglylthreonylleucylglutamylasparaginyllysynylserylisoleucylasparaginylvalyllysylcylprolylcysteinyllysylaspartylisoleucthreonyllysylserylserylcysteinyllysyllylprolylglutamylphenylalanylaspartylglucylhistidyltyrosylvalylleucylglutamylrginylarginylthreonyltyrosylisoleucylpmylasparaginyllysylleucylseryltryptophsoleucylprolylasparaginylglycylglutamyinylvalyllysylalanylvalylasparaginyllyyrosylisoleucylglutamylleucyllysylaspautaminylaspartylprolyllysylglutaminylplaspartylvalylglutamylvalylhistidylasplalanylmethionylthreonylisoleucylthreoltyrosylaspartylglycylglycylseryllysyleucylisoleucylglutamyllysylisoleucylalnyltryptophyllysylarginylcysteinylasparolylisoleucylleucylthreonyltyrosylthrlglutamylglycyllysylglutamyltyrosylglunylalanylglutamylasparaginylalanylalanlserylarginylalanylthreonylprolylprolyolylisoleucylaspartylalanylprolyllysylserylleucylglutamylvalyllysylarginylglleucylaspartylalanylserylisoleucylseryonylisoleucylthreonyltryptophylisoleucalylisoleucylvalylprolylglutamylglutamlanylprolylleucylvalylarginylarginylarinylglutamylglutamylglutamylprolylphenonylglutaminylarginylleucylserylisoleuylglycylglutamylserylglutaminylleucylaylarginylprolylaspartylhistidylglycyllvalylglutamylasparaginylaspartylhistidrolylcysteinylthreonylvalylserylvalyllolylprolylisoleucylasparaginylphenylalylisoleucylarginyllysylthreonylserylvautamylprolylprolylleucylaspartylaspartlisoleucylasparaginyltyrosylthreonyllethreonyllysylprolylaspartylserylglutamonylserylthreonylleucylarginylhistidylonyllysylleucylisoleucylglutamylglycylnylarginylvalylarginylalanylglutamylasrolylglycylprolylprolylcysteinylvalylsylaspartylprolylphenylalanylglycylprolllysylprolylisoleucylvalylglutamylasparylmethionylleucylvalyllysyltryptophyltylasparaginylglycylserylprolylisoleucylglutamyllysylarginylglutamylvalylaspphylserylarginylvalylasparaginyllysylsucyllysylalanylasparaginylvalylaspartyucylthreonyltyrosylvalylphenylalanylarparaginylalanylalanylglycylprolylglycyserylaspartylprolyllysylthreonylalanyllprolylprolylglycylprolylprolylisoleuclthreonylserylserylthreonylthreonylisohylglutamylprolylprolylalanylphenylalatamylisoleucylvalylglycyltyrosylphenyleucylvalylglycylthreonylasparaginyllysreonylglutamyllysylmethionylisoleucyllreonylvalyllysylglutamylisoleucylarginyllysylleucylarginylvalylserylalanylvatamylglycylprolylprolylglycylglutamyltlvalylalanylglutamylprolylglutaminylglylleucylaspartylvalylserylvalyllysylglcylmethionylalanylglycyllysylthreonylllylvalylthreonylglycylarginylprolylvallthreonyllysylglutamylglutamylglycylglginylvalylvalylisoleucylaspartylasparalutamylleucylisoleucylisoleucyllysylastylhistidylglycylarginyltyrosylvalylisginylserylcysteinylglycylseryllysylphealylglutamylvalylphenylalanylaspartylvpartylleucyllysylprolylvalylvalylthreocysteinylleucylleucylasparaginyltryptortylaspartylglycylglycylserylglutamylisoleucylisoleucylglutamylarginyllysylathreonyltryptophylarginylglutaminylprolarginylseryllysylcysteinylaspartylisotamylglycylglutaminylglutamyltyrosyllylalanyllysylasparaginyllysylphenylalanvalylglutamylisoleucylglycylprolylisollleucylglycylprolylprolylthreonylseryltyrosylthreonylglutamylarginylglutaminonylleucylaspartyltryptophyllysylglutacylglycylserylprolylisoleucylglutaminytamyllysylarginylarginylhistidylaspartutamylarginylvalylasparaginyllysylargieonylserylphenylalanylleucylvalylglutalhistidylglutaminylmethionyltyrosylglulanylvalylasparaginylglutamylisoleucylrylleucylprolylleucylasparaginylvalylvrtylglutamylvalylprolylprolylthreonyliylvalylarginylglycylaspartylthreonylislutamylprolylvalylhistidylisoleucylprolleucylprolylmethionylprolyllysylisolearaginylglutamylthreonylvalylisoleucylalanylleucylglutaminylisoleucylthreonyinylserylglutamylalanyllysylthreonylglylalanylvalylarginylglutamylaspartyllyylthreonylalanylserylasparaginylarginyarginylasparaginylvalylhistidylvalylglolylserylprolylprolylarginylasparaginysoleucyllysylalanylglutamylserylcysteispartylalanylprolylleucylaspartylaspareucylthreonylhistidyltyrosylvalylisolenylserylarginyllysyllysylalanylglutamyeonylasparaginylthreonylalanylvalylgluucyltryptophyllysylleucylisoleucylprollglutamylphenylalanylarginylvalylarginlglycylisoleucylserylaspartylglutamylclvalylisoleucylglutaminylaspartylprolyolylprolylglycyllysylprolyllysylvalyllylserylmethionylleucylvalylseryltryptotylasparaginylglycylglycylserylprolyliphylleucylglutamyllysylarginylglutamylptophylserylarginylvalylserylarginylalylglycylleucyllysylglycylvalylglutamylrginylleucylleucylglutamylglycylvalyllginylalanylmethionylalanylisoleucylaspglycylprolylprolylserylglutamylprolylsylglycylaspartylprolylisoleucylphenylaserylcysteinylprolylglutamylvalyllysyllisoleucylserylleucylglycyltryptophyllglycylglycylserylprolylisoleucyllysylgethionylglutaminylglutamylglutamylglycllysylarginylvalylasparaginylglutamylpreonylthreonylcysteinylglutamylcysteinlysylglutamylleucylarginyllysyltyrosyllalanylvalylasparaginylglutamylalanylgylaspartylthreonylthreonylglycylglutamrtylisoleucylglutaminylglutamylglutamyleucylaspartylisoleucylglycylalanylglucysteinyllysylalanylglycylserylglutamilanylvalylisoleucyllysylglycylarginylpryptophylglutamylphenylalanylaspartylghionyllysylaspartylglycylvalylhistidylrtylalanylglutaminylleucylglutamylthreerylvalylisoleucylisoleucylisoleucylprrylhistidylthreonylglycyllysyltyrosylsaraginyllysylalanylglycylglutaminyllyslarginylvalyllysylvalylmethionylaspartlaspartylleucyllysylvalylserylaspartylcysteinylarginylleucylseryltryptophyllaspartylglycylglycylaspartylarginylisocylglutamyllysylarginylthreonylisoleucylthreonyllysylvalylasparaginylprolylathreonylphenylalanylvalylvalylprolylasaminylglutaminyltyrosylphenylalanylphelutamylasparaginylarginylphenylalanylgylglutamylthreonylisoleucylglutaminylaaspartylprolylisoleucyltyrosylprolylprsylleucyllysylisoleucylglycylleucylisonylvalylhistidylleucylseryltryptophyllartylglycylglycylserylprolylvalylthreotamylcysteinylleucylalanyltryptophylasysyllysylglutamylalanyltryptophylarginylarginylaspartylvalylglutamylglutamyllvalylglutamylaspartylleucylvalylglutamylphenylalanylarginylvalyllysylalanylalylseryllysylprolylserylalanylthreonycysteinylglutaminylarginylprolylaspartylaspartylleucyllysylglutamylphenylalautamylglycylthreonylasparaginylvalylassoleucyllysylglycylvalylprolylphenylalptophylphenylalanyllysylalanylprolylprinyllysylglutamylprolylvalylleucyltyroaraginyllysylleucylvalylvalylaspartylacylvalylisoleucylprolylglutaminylserylglycylleucyltyrosylthreonylisoleucylthinylleucylglycylthreonylalanylseryllysaraginylvalylleucylglycylarginylprolylisoleucyllysylphenylalanylglutamylserymethionylthreonylleucylseryltryptophylylaspartylglycylglycylseryllysylisoleusoleucylglutamyllysylarginylglutamylaltryptophylvalylhistidylvalylserylseryllthreonyltyrosyl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(a)- Khi cho E tác dụng với NaHCO₃ sinh ra V lít khí (CO₂) và muối natri của X => X là axit

- Ta thấy thể tích khí sinh ra khi cho E tác dụng với Na (khí H₂) lớn hơn 0,5 lần thể tích khí khi cho E tác dụng với NaHCO₃ (khí CO₂) => Y là ancol

Vậy E gồm axit X, ancol Y và este Z (tạo bởi X, Y)

Giả sử V lít tương ứng với 1 (mol) khí

+ n_CO2 = n_-COOH = 1 (mol)

+ n_H2 = 0,5n_-COOH + 0,5n_-OH => 0,75 = 0,5.1 + 0,5n_-OH => n_-OH = 0,5 (mol)

+ n _{hỗn hợp} = 2n_H2 = 1,5 mol => n_X = n_Y = n_Z = 1,5:3 = 0,5 mol

Số chức của axit X là: 1 : 0,5 = 2

Số chức của ancol Y là: 0,5 : 0,5 = 1

=> Este Z có 2 chức

* Đốt cháy muối natri của X:

Muối natri của X có dạng RO₄Na₂

Gọi số mol muối của X là x (mol)

BTNT Na: n_Na2CO3 = n _muối = x (mol)

BTNT O: 4n _muối + 2n_O2 = 2n_CO2 + n_H2O + 2n_Na2CO3

=> 4x + 2n_O2 = 0,03.2 + 0,02 + 3x => n_O2 = 0,04 – 0,5x (mol)

BTKL: m _muối + m_O2 = m_CO2 + m_H2O + m_Na2CO3

=> 1,62 + 32(0,04 - 0,5x) = 0,03.44 + 0,02.18 + 106x

=> x = 0,01 mol

=> M _muối = 162 => R + 16.4 + 23.2 = 162 => R = 28  => CTPT của X là C₄H₆O₄

* Đun nóng Y với H₂SO₄ đặc thu được Y₁ có tỉ khối so với Y là 34/43 => phản ứng tách nước tạo anken

=> M_Y1 = M_Y – 18

=> d_Y1/Y = (M_Y-18)/M_Y = 34/43 => M_Y = 86 (C₅H₁₀O)

Mà khi đun Y₁ với KMnO₄/H₂SO₄ thu được Y₂ duy nhất, không có khí thoát ra, Y₂ có cấu tạo mạch thẳng và là điaxit nên Y₁ có cấu tạo mạch vòng, chứa 1 liên kết đôi.

- Cấu tạo Y₁:

- Cấu tạo Y₂: HOOC-(CH₂)₃-COOH

- Cấu tạo Y: 

- Cấu tạo X:

HOOC-CH₂-CH₂-COOH hoặc HOOC-CH(CH₃)-COOH

- Cấu tạo Z:

Hoặc

(b)Giả sử số mol mỗi chất trong ½ hỗn hợp G: 

- Khối lượng của ½ hỗn hợp G:

118x + 86y + 254z = 7,8 (1)

- Đốt cháy phần 1 cần n_O2 = 9,408 : 22,4 = 0,42 mol:

C₄H₆O₄ + 3,5 O₂ → 4CO₂ + 3H₂O

x                3,5x

C₅H₁₀O + 7O₂ → 5CO₂ + 5H₂O

y                7y

C₁₄H₂₂O₄ + 17,5O₂ → 14CO₂ + 11H₂O

z                    17,5z

Ta có: n_O2 = 0,42 => 3,5x + 7y + 17,5z = 0,42 (2)

- Phần 2 tác dụng vừa đủ với n_NaOH = 0,04.2 = 0,08 mol:

C₂H₄(COOH)₂ + 2NaOH → C₂H₄(COONa)₂ + 2H₂O

x                              2x                     x

C₂H₄(COOC₅H₉)₂ + 2NaOH → C₂H₄(COONa)₂ + 2C₅H₉OH

z                                     2z                    z                        2z

n_NaOH = 2n_X + 2n_Z => 2a + 2c = 0,08 (3)

Từ (1) (2) (3) ta có hệ phương trình:

Sau phản ứng thu được: