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64. Massasi \( 75 g \) bo'ggan natriy sulfatning to yingan eritmasidagi suvsiz tuzning massa ulushi \( 34,2 \% \mathrm{ga} \) teng. Shu eritmaga \( 19,5 \mathrm{~g} \) suvsiz tuz qo'shildi va to'la erib ketguncha qizdirildi, so'ngra boshlang'ich temPeraturagacha sovutildi. Bunda cho' \( \mathrm{kmaga} 35,03 \mathrm{~g} \) kristallogidrat tushdi. Kristallogidrat formulasini to'ing. A) \( \left.\mathrm{Na}_{2} \mathrm{SO}_{4} \cdot 10 \mathrm{H}_{2} \mathrm{O} \mathrm{B}\right) \mathrm{Na}_{2} \mathrm{SO}_{4} \cdot 7 \mathrm{H}_{2} \mathrm{O} \) C) \( \left.2 \mathrm{Na}_{2} \mathrm{SO}_{4} \cdot 7 \mathrm{H}_{2} \mathrm{O} \mathrm{D}\right) \mathrm{Na}_{2} \mathrm{SO}_{4} \cdot 5 \mathrm{H}_{2} \mathrm{O} \) 65. Massasi 90 g bo'lgan kalsiy bromidning to'yingan eritmasidagi suvsiz tuzning massa ulushi \( 45,3 \% \mathrm{ga} \) teng. Shu eritmaga \( 18 g \) suvsiz tuz qo'shildi va to'la erib ketguncha qizdirildi, so'ngra boshlang'ich temPeraturagacha sovutildi. Bunda cho'kmaga 23 g kristallogidrat tushdi. Kristallogidrat formulasini to'ing. A) \( \left.2 \mathrm{CaBr}_{2} \cdot 3 \mathrm{H}_{2} \mathrm{OB}\right) 2 \mathrm{CaBr}_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O} \) C) \( \left.\mathrm{CaBr}_{2} \cdot 5 \mathrm{H}_{2} \mathrm{O} \mathrm{D}\right) \mathrm{CaBr} 2 \cdot 6 \mathrm{H}_{2} \mathrm{O} \) 66. Massasi 100 g bo'lgan kalsiy bromidning to'yingan eritmasidagi suvsiz tuzning massa ulushi \( 45,3 \% \) ga teng. Shu eritmaga 21 g suvsiz tuz qo'shildi va to'la erib ketguncha qizdirildi, so'ngra boshlang'ich temPeraturagacha sovutildi. Bunda cho'kmaga \( 34,35 \mathrm{~g} \) kristallogidrat tushdi. Kristallogidrat formulasini to'ing. A) \( \left.2 \mathrm{CaBr}_{2} \cdot 3 \mathrm{H}_{2} \mathrm{OB}\right) 2 \mathrm{CaBr}_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O} \) C) \( \mathrm{CaBr}_{2} \cdot 5 \mathrm{H}_{2} \mathrm{OD} \) ) \( \mathrm{CaBr}_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O} \) 67. \( \mathrm{FeSO}_{4} \) ning \( 40^{\circ} \mathrm{C} \) dagi 400 gr to'yingan eritmasi 20 \( { }^{\circ} \mathrm{C} \) ga qadar sovutilganda \( \mathrm{FeSO}_{4} \cdot 7 \mathrm{H}_{2} \mathrm{O} \) tarkibli kristallogidrat cho'kmaga tushdi va \( \mathrm{FeSO}_{4} \) ning konsentratsiyasi \( 16,86 \% \) ni tashkil etdi. Cho'kmaga tushgan kristallogidratning massasini (gr) aniqlang. ( 100 gr suvda 43 gr tuz erigan A) 120 B) 143 C) 139 D) 76
Chemistry Jan 20, 2025
55. Kally karbonatning \( 40^{\circ} \mathrm{C} \) dagi eruvchanligi 130 ga teng bo'lsa, ushbu erilmaning \( (p=1,62 \mathrm{~g} / \mathrm{ml}) \) molyar konsentratsiyasini ( \( \mathrm{mol} / \mathrm{l} \) )hisoblang. A) 4,6 B) 6,6 C) 3,4 D) 8,2 56. 100 g suvda \( 80^{\circ} \mathrm{C} \) da \( 520 \mathrm{~g}, 30^{\circ} \mathrm{C} \) da esa 220 g kurmush nitrat eridi. Kumush nitratning \( 80^{\circ} \mathrm{C} \) dagi 1240 g to'yingan critmasi \( 30^{\circ} \mathrm{C} \) gacha sovutilganda cho'kmaga tushadigan kumush nitratning massasini (g)hisoblang A) 450 B) 600 C) 256 D) 300 57. 100 g suvda \( 110^{\circ} \mathrm{C} \) da \( 160 \mathrm{~g} \cdot 0^{\circ} \mathrm{C} \) da csa 110 g kaliy karbonat cridi. Kaliy karbonatning 390 g to \( { }^{\circ} \) yingan \( \left(110^{\circ} \mathrm{Cda}\right) \) eritmasi \( 0^{\circ} \mathrm{C} \) gacha sovutilganda cho kmaga tushadigan kaliy karbonatning massasimi (g)hisoblang. A) 56 B) 75 C) 49 D) 84 58. Kally bromidning \( 80^{\circ} \mathrm{C} \) dagi to yingan eritmasi \( 20^{\circ} \mathrm{C} \) gacha sovutilganda 90 g cho kma tushgan bo'lsa, ushbu to yingan eritmant \( \left(80^{\circ} \mathrm{C}\right. \) da) tayyorlash uchun zarur bo'lgan kaliy bromid va suvning massasini (g) hisoblang. \( S\left(20^{\circ} \mathrm{C}\right)=60 ; S\left(80^{\circ} \mathrm{C}\right)=90 \) A) \( 270 ; 300 \) B) \( 250 ; 320 \) C) \( 200 ; 370 \) D) 190; 380 59. Kaliy bromidning \( 90^{\circ} \mathrm{C} \) dagi to yingan eritmasi \( 30^{\circ} \mathrm{C} \) gacha sovutilganda. 120 g tuz cho kmaga tushgan bo'lsa, ushbu to yingan eritmani \( \left(90^{\circ} \mathrm{Cda}\right) \) tayyorlash uchun zarur bo'lgan kaliy bromid va stivning massasini (g)aniqlang. \( S\left(30^{\circ} \mathrm{C}\right)=70 ; S\left(90^{\circ} \mathrm{C}\right)=100 \) A) \( 450 ; 350 \) B) \( 400 ; 400 \) C) \( 380 ; 630 \) D) \( 555 ; 245 \)
Chemistry Jan 20, 2025
8. \( 200 \mathrm{~g} 30 \% \) li bariy nitrat eritmasiga nechagramm \( \mathrm{Na}_{2} \mathrm{SO}_{4} \cdot 10 \mathrm{H}_{2} \mathrm{O} \) kristallogidrat qo'shilganda eritmadag bariy nitratning massaulushi \( 20 \% \) ga teng bolib qoidi. A) 23,1 B) 70,68 C) 44,53 D) 21.24 9. \( 300 \mathrm{~g} 20 \% \) If bariy xlorid eritmasiga neche gramm \( \mathrm{Na}_{2} \mathrm{SO}_{4} \cdot 10 \mathrm{H}_{2} \mathrm{O} \) kristallogidrat qo'shilganda eritmadagi bariy xloridning massa ulushi \( 10 \% \) ga teng bolib qoldi. A) 23,1 B) 70,68 C) 44,53 D) 21.24 10. \( 600 \mathrm{~g} 20 \% \) li bariy xlorid eritmasiga necha gramm \( \mathrm{Na}_{2} \mathrm{SO}_{4} \cdot 10 \mathrm{H}_{2} \mathrm{O} \) kristallogidrat qo'shilganda eritmadagi bariy xloridning massa ulushi \( 12 \% \) ga teng bo'ib qoidi. A) 23,1 B) 70,68 C) 44,53 D) 21.24 11. CuSO4 ning toyyingan \( \left(22^{\circ} \mathrm{C}\right. \) da) 200 g eritmasiga 4 g suvsiz mis (II) sulfat qo'shilganda cho'kmaga tushgan kristallogidrat tarkibida \( 4,98 \mathrm{~g} \) suvsiz tuz borligi aniqlandi. Suvsiz CuSO 4 tuzining \( 22^{\circ} \mathrm{C} \) dagi eruvchanligi 25 ga teng bo'lsa, kristallogidratdagi 1 mol tuzga necha mol suv tog'ri kelishini aniqlang. *) 7 B) 4 C) 5 D) 2 12. FeSO4 ning to'yingan \( \left(30^{\circ} \mathrm{C}\right. \) da) 150 g eritmasiga \( 7,5 \mathrm{~g} \) suvsiz temir(II) sulfat qo'shilganda cho'kmaga tushgan kristallogidrat tarkibida \( 8,906 \mathrm{~g} \) suvsiz tuz borligi aniqlandi. Suvsiz FeSO 4 tuzining \( 30^{\circ} \mathrm{C} \) dagi cruvchanligi 33,33 ga teng bo'isa, kristallogidratuagi 1 mol tuzga necha mol suv tog'ri kelishini aniqlang. A) 7 B) 4 C) 5 D) 2
Chemistry Jan 20, 2025
8. \( 200 \mathrm{~g} \mathrm{30} \mathrm{\%} \mathrm{li} \mathrm{bariy} \mathrm{nitrat} \mathrm{eritmasiga} \mathrm{nechagramm} \) \( \mathrm{Na}_{4} \mathrm{SO}_{4} \cdot 10 \mathrm{H}_{2} \mathrm{O} \) kristallogidrat qo'shilganda eritmadagi bariy nitmatning massaulushi \( 20 \% \) ga teng bolib qoldi. A) 23,1 B) 70,68 C) 44,53 D) 21.24 \( 9.300 \mathrm{~g} \mathrm{20} \mathrm{\%} \mathrm{li} \mathrm{barly} \mathrm{xlorid} \mathrm{eritmasiga} \mathrm{necha} \mathrm{gramm} \) \( \mathrm{Na}_{2} \mathrm{SO}_{4} \) - \( 10 \mathrm{H}_{2} \mathrm{O} \) kristallogidrat qo'shilganda critmadagi bariy xtoridning massa ulushi \( 10 \% \) ga teng bo ib qoldi. A) 23,1 B) 70,68 C) 44,53 D) 21.24 10. \( 600 \mathrm{~g} 20 \% \) li bariy xlorid eritmasiga necha gramm \( \mathrm{Na}_{2} \mathrm{SO}_{4} \cdot 10 \mathrm{H}_{2} \mathrm{O} \) kristallogidrat qo'shilganda eritmadagi barly xforidning massa utushi \( 12 \% \) ga teng botib qoldi. A) 23,1 B) 70,68 C) 44,53 D) 21.24 11. CuSO4 ning to yingan ( \( 22^{\circ} \mathrm{C} \) da) 200 g eritmasiga 4 g suvsiz mis (II) sulfat qo'shilganda cho kmaga tushgan kristallogidrat tarkibida \( 4,98 \mathrm{~g} \) suvsiz tuz borligi aniqlandi. Suvsiz CuSO 4 tuzining \( 22^{\circ} \mathrm{C} \) dagi eruvchanligi 25 ga teng bo'lsa, kristallogidratdagi 1 mol pugga necha mol suv tog'ri kelishini aniqlang. 7 B) 4 C) 5 D) 2 12. FeSO4 ning to'yingan ( \( 30^{\circ} \mathrm{C} \) da) 150 g eritmasiga \( 7,5 \mathrm{~g} \) suvsiz temir(II) sulfat qo'shilganda cho'kmaga tushgan kristallogidrat tarkibida \( 8,906 \mathrm{~g} \) suvsiz tuz borligi aniqlandi. Suvsiz FeSO 4 tuzining \( 30^{\circ} \mathrm{C} \) dagi cruvchanligi 33,33 ga teng bo'lsa, kristallogidratdagi 1 mol tuzga necha mol suv tog'ri kelishini aniqlang. A) 7 B) 4 C) 5 D) 2 13. Na2SO3 ning to yingan ( \( 25^{\circ} \mathrm{C} \) da) 100 g eritmasiga 15 g suvsiz natriy sulfit qo'shilganda chokmaga tushgan kristallogidrat tarkibida \( 47,727 \mathrm{~g} \) suvsiz tuz borligi aniqlandi. Suvsiz Na 2 SO 3 tuzining \( 25^{\circ} \mathrm{C} \) dagi eruvchanligi 60 ga teng bo'tsa, kristallogidratdagi 1 mol tuzga necha mol suv tog'ri kelishini aniqlang. A) 7 B) 4 C) 5 D) 8 14. Li2SO4 ning to yingan ( \( 15^{\circ} \mathrm{C} \) da) 120 g eritmasiga \( 6,4 \mathrm{~g} \) suvsiz litiy sulfat qo'shilganda cho'kmaga tushgan kristallogidrat tarkibida \( 7,364 \mathrm{~g} \) suvsiz tuz borligi aniqlandi. Suvsiz Li 2 SO 4 tuzining \( 15^{\circ} \mathrm{C} \) dagi eruvchanligi 20 ga teng bo"lsa, kristallogidratdagi 1 mol tuzga necha mol suv tog'ri kelishini aniqlang. A) 7 B) 4 C) 5 D) 2
Chemistry Jan 20, 2025
45. Kaliysulfatning 100 g eritmasida \( 100^{\circ} \) Cdal \( 5,4 \mathrm{~g} \) tuz, 100 g eritmada0 \( { }^{\circ} \mathrm{Cda} \) esa \( 6,85 \mathrm{~g} \) tuz boladi. Shu tuzning \( 100^{\circ} \mathrm{Cda} \) to yintirigan 100 g eritmasi \( 0^{\circ} \mathrm{C} \) gacha sovutilsa, qancha tuz cho'kmaga tushadi? A) 9,18 B) 37 C) 27 D) 23 46. Bariy xloridning \( 15 \% \) Cda to yingan 12.8 g eritmasidan suvni buglatib yuborish yo'l bilar 4.1 g krlstattogidrat \( \mathrm{BaCl}_{2} \cdot 2 \mathrm{H}_{2} \mathrm{O} \) otindt. Suvsiz tuयning shu haroratdagi eruvehantigini aniqlang. A) 35,7 B) 201,25 C) 37,6 D) 23,5 47. \( 55^{\circ} \) Cdagi \( \mathrm{NH}_{4} \mathrm{Cl} \) ning 360 g to yingan eritmasi \( 30^{\circ} \mathrm{C} \) gacha sovutilganda necha \( g \) tuz cho kmaga tushadi? \[ S\left(55^{\circ} \mathrm{C}\right)=805\left(30^{\circ} \mathrm{C}\right)=45 \mathrm{~g} \] A) 60 B) 70 C) 125 D) 97,5 48. \( 80^{\circ} \mathrm{Cda} \) kally yodidning 146 g to yingan eritmasi \( 20^{\circ} \mathrm{C} \) gacha sovutilganda, necha gramm tuz kristal holda cho kadi. \[ \left(S\left(20^{\circ} \mathrm{C}\right)=144 \mathrm{~g} \cdot S\left(80^{\circ} \mathrm{C}\right)=192 \mathrm{~g}\right) \] A) 24 B) 26 C) 19.9 D) 17.7 49. Kumush nitratning \( 60^{\circ} \mathrm{C} \) dagi 1250 g to yingan eritmasi \( 10^{\circ} \mathrm{C} \) gacha sovutilganda, necha gramre tuz kristal holda cho'kadi. \[ \left(S 10^{\circ} \mathrm{C}=170 \mathrm{~g} .560^{\circ} \mathrm{C}=525 \mathrm{~g}\right) \] A) 40 B\( ) 206 \mathrm{C}) 420 \) D) 710 50. \( 60^{\circ} \mathrm{Cdagi} \mathrm{NaNO}_{3} \) ning 525 g to yingan eritmasi \( 30^{\circ} \mathrm{C} \) gacha sovutilganda necha \( g \) tuz cho'kmaga tushadi? \[ S\left(60^{\circ} \mathrm{C}\right)=110 S\left(30^{\circ} \mathrm{C}\right)=60 \mathrm{~g} \] A) 60 B) 70 C) 125 D) 97.5 51. \( 10^{\circ} \mathrm{Cda} 1427.15 \mathrm{~g} \) ammiakning to \( { }^{2} \) yingan eritraasi \( 50^{\circ} \mathrm{C} \) gacha qizdirilganda, ajralib chiqadigan ammiakning hajmini ( \( l, n, s h \). ) hisolang ( \( \$ 10^{\circ} \mathrm{C}=67.9 \mathrm{~g}, S 50^{\circ} \mathrm{C}= \) 22,9 g). A) 504 B) 520 C) 604 D) 382,5
Chemistry Jan 20, 2025
37. \( 5^{\circ} \mathrm{Cda} \) to yintirilgan 405 g eritmada necha gramm ammonly xlorid boladi. Bu tuzning shu haroratdagi eruvchanlik koeffisiyenti 35 g ga teng. A) 35 B) 105 C) 70 D) 100 38. 50 g to'yingan eritmada \( 40^{\circ} \mathrm{Cda} 6,5 \mathrm{~g} \) kaliy sulfat bo’adi. Eruvchanlik koeflisiyentini aniqlang. A) 13 B) 14,9 C) 10 D) 38 39. 200 g eritmada \( 50^{\circ} \mathrm{C} d a 54 \mathrm{~g} \) natriy xlorid bo'ladi. Tuzning eruvchanligini aniqlang. A) 9,18 B) 37 C) 27 D) 23 40. Natriy xloridning \( 10^{\circ} \mathrm{Cdagi} \) to'yingan 200 g eritmasini quriguncha bug'latish yoli bilan \( 52,6 \mathrm{~g} \) tuz olindi. Natriy xloridning \( 10^{\circ} \mathrm{Cdagi} \) eruvchanligini aniqlang. A) 35,7 B) 201.25 C) 37,6 D)23,5 41. \( 60^{\circ} \mathrm{C} \) dagi NaCl ning 620 g to'yingan eritmasi \( 40^{\circ} \mathrm{C} \) gacha sovutilganda necha \( g \) tuz cho'kmaga tushadi? \( S\left(60^{\circ} \mathrm{C}\right)=55 S\left(40^{\circ} \mathrm{C}\right)=40 \mathrm{~g} \) A) 60 B)70 C) 125 D) 97,5 42. Natriy nitritning \( 10^{\circ} \mathrm{Cdagi} \) eruvchanligi \( 80,5 \mathrm{~g} \) ga teng. Shu haroratda 250 g suvda necha gramm tuzni eritish mumkín. A) 35,7 B) 201,25 C) 37,6 D) 23,5
Chemistry Jan 20, 2025
17 Bir yil oldin Abbosning bo'yi \( 1,55 \mathrm{~m} \) edi. Hozir esa \( 1,62 \mathrm{~m} \). Abbosning bo'yi necha foizga o'sganini toping. Javobni yuzdan birlar xonasigacha yaxlitlang.
Arithmetic Jan 20, 2025
15. \( \mathrm{MgCl}_{2} \) ning to'yingan eritmasini tayyorlash uchun 420 g tuzni necha \( g \) suvda eritish kerak? \( S\left(40^{\circ} \mathrm{C}\right)=120_{\mathrm{g}} \) A) 350 B) 450 C) 300 D) 250 16. 875 g to yingan etirma tayyorlash uchun necha \( g \) suv va necha \( g \) tuz kerak bo'ladi? \( S\left(80^{\circ} \mathrm{C}\right)=250 \mathrm{~g} \) A) \( 500 ; 375 \) B) \( 625 ; 250 \) C) \( 250 ; 625 \) D) \( 400 ; 475 \) 17. \( \mathrm{NH}_{4} \mathrm{Br} \) ning to yingan eritmasini tayyorlash uchun 250 g suvda necha \( g \) tuzni eritish kerak? \( S\left(50^{\circ} \mathrm{C}\right)=80 \mathrm{~g} \) A)102 B) 135 C) 200 D) 210 18.375 g to'yingan etirma tayyorlash uchun necha \( g \) suv va necha \( g \) tuz kerak boladi? \( S\left(80^{\circ} \mathrm{C}\right)=150 \mathrm{~g} \) A) \( \mathbf{2 0 0 ; 1 7 5} \) B) \( 150 ; 225 \) C) \( 100 ; 275 \) D) \( 225 ; 150 \) 19. \( \mathrm{Na}_{2} \mathrm{CO}_{3} \) ning to'yingan eritmasini tayyorlash uchun 495 g tuzni necha \( g \) suvda eritish kerak? \( S\left(50^{\circ} \mathrm{C}\right)=110 \mathrm{~g} \) A) 350 B) 450 C) 300 D) 250 20. 700 g to'yingan etirma tayyorlash uchun necha \( g \) suv va necha \( g \) tuz kerak bo'ladi? \( S\left(60^{\circ} \mathrm{C}\right)=100 \mathrm{~g} \) A) \( 500 ; 200 \) B) \( 250 ; 450 \) C) \( 400 ; 300 \) D) \( 350 ; 350 \) 21. NaClning to'yingan eritmasini tayyorlash uchun 180 g suvda necha \( g \) tuzni eritish kerak? \( S\left(30^{\circ} \mathrm{C}\right)=75 \mathrm{~g} \) A) 102 B)135 C) 200 D) 210 22. 210 g to'yingan etirma tayyorlash uchun necha \( g \) suv va necha \( g \) tuz kerak bo'ladi? \( S\left(20^{\circ} \mathrm{C}\right)=50 \mathrm{~g} \) A) 140;70 B) \( 60 ; 150 \) C) \( 150 ; 60 \) D) \( 70 ; 140 \); 23. \( \mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2} \) ning to'yingan eritmasini tayyorlash uchun 195 g tuzni necha \( g \) suvda eritish kerak? \( S\left(20^{\circ} \mathrm{C}\right)=65 \mathrm{~g} \) A) 350 B) 450 C) 300 D) 250
Chemistry Jan 20, 2025
8. Eng kichik o'lchov birligiga o'tkazib hisoblang. \( (3 \mathrm{~km} 282 \mathrm{~m}+6 \mathrm{~km} 126 \mathrm{~m}): 12-234 \mathrm{~m} 7 \mathrm{dm} \) \( 4:(8 \mathrm{~m} 6 \mathrm{dm} 2 \mathrm{~cm}-2 \mathrm{~m} 17 \mathrm{~cm})+24 \mathrm{dm} 1 \mathrm{~cm} \)
Arithmetic Jan 20, 2025
17 Bir yil oldin Abbosning bo'yi \( 1,55 \mathrm{~m} \) edi. Hozir esa \( 1,62 \mathrm{~m} \). Abbosning bo'yi necha foizga o'sganini toping. Javobnì yuzdan birlar xonasigacha yaxlitlang.
Arithmetic Jan 20, 2025
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