Kimyoning dastlabki tushunchalarl kimyo faniga hissa qo’shgan olimlar

3.01*10²⁴

C
O

33. Na2CO3∙10H2O ning 429 gr miqdori uchun kerakli qiymatlarni jadvalga kiriting.

	Necha mol	Necha gram	Necha dona	Qancha zarra
Na2CO3∙10H2O
O
C
Na
H			1.8*10^25

34. 21 g magniy karbonatda necha mol magniy atomlari mavjud? [MgCO3]
A) 0.25 B) 0.5 C) 1.0 D) 0.75
35. 80 g temir(III)-oksidida necha mol temir bor?
A) 2.0 B) 1.0 C) 1.5 D) 1.3
36. 3.5 mol kalsiy tarkibida nechta atom mavjud?
A) 1,2∙1024 B) 2,4∙1024 C) 6,02∙1023 D) 2,1∙1024
37. 1 mol tetrafosfor va 2 mol ozondagi atomlar sonining nisbatini toping.
A) 1:2 B) 1:1,5 C) 1:1 D)2:1
38. Necha mol metanda 1,6∙1024 dona vodorod atomlari bor?
A) 0,48 B) 0,66 C) 0,88 D) 1,2
39. 2 mol suvda nechta vodorod atomi bor?
A) 6∙1024 B) 12∙1023 C) 2,4∙1024 D) 6∙1023
40. 1,5 mol С12O va 3 mol N2O dagi kislorod atomlarining nisbatini toping.
A) 1:2 B) 1:3 C) 1:4 D) 1:5
41. 6,02∙1021 kislorod molekulasining modda miqdorini xisoblang.
A) 1 B) 0,1 C) 0,01 D) 0,5
42. 1,505∙1024 suv molekulasining massasini (g) va 6,02∙1022 suv molekulasining miqdorini (mol) xisoblang.
A) 36; 0,01 B) 40; 1,0 C) 45; 0,1 D) 0,45; 10
43. Tarkibida 0,01 mol modda saqlovchi alyuminiy sulfat eritmasidagi ionlar sonini aniklang. [Al2(SO4)3]
A) 3.01∙1022 B) 1,2∙1023 C) 6∙1022 D) 1,5∙1023
ARALASHMA:
44. 1000 g grammli tarozi toshi tarkibida 95% temir bo’lgan chuyandan yasalgan. Tosh tarkibida necha mol temir bor?
A) 20 B) 18 C) 16 D) 17
45. Temir ma’dani tarkibida 34% Fe203 bo’lsa, uning 100 kg massasida temir moddasining miqdori qancha?
A) 4,25∙101 B) 4,25∙102 C) 3,8∙102 D)4,25
46. 224 litr havo tarkibida necha dona kislarod molekulasi saqlashi mumkin? Havo tarkibida kislorodning hajmiy ulushi 20% deb hisoblang.
A) 3,01∙1024 B) 6.02∙1023
C) 5,04∙1023 D)1,204∙1024
NISABALAR HAQIDA TUSHUNCHA:
47. 2 mol suv va ikki mol H2SO4 dagi atomlar sonining nisbatini toping.
A) 1:2,33 B) 1:2,5 C) 1:2 D) 1:1,5
48. 3 mol oltingugurt(IV)-oksid va 3 mol karbonat angidrid atomlar sonining nisbatini toping.
A) 1:1,5 B) 1:1 C) 1:2 D) 1:2,5
49. 0.5 mol N2O5 va 1.5 mol Na2O dagi atomlar sonining nisbatini toping.
A) 1:1,3 B) 1:2,3 C) 1:1,5 D)3,5:0,5
50. 1,25 mol Fe2O3 va 2.25 mol А12O3 dagi atomlar sonining nisbatini toping.
A) 1:1,2 B) 1:1,8 C) 1:1,5 D) 1:2,5
51. 1.75 mol С12O5 va 0.75 mol Мn2O7 dagi atomlar sonining nisbatini toping.
A) 1,8:2 B) 1:1,8 C) 1,8:1 D)2:1
52. 0.25 mol N2O va 0.5 mol Fe(OH)3 dagi atomlar sonining nisbatini toping.
А) 1:2,7 B) 1:3,7 C)1:4,7 D) 1:1
53. 0.75 mol В2O3 va 1 mol КСlO3 dagi atomlar sonining nisbatini toping.
A) 1:1,6 B) 1:1,4 C) 1:1,5 D) 1:1,3
54. 3 mol С12O ва 2 mol N2O3 dagi atomlar sonining nisbatini toping.
А) 1:1,1 B) 1:2,1 C) 1:1,2 D) 1:1,3
55. Oltingugurt va temir kukuni 8:14 og’irlik nisbatida olingan bo’lsa,ularning mol nisbatlari qanday bo’ladi?
A) 8:14 B) 4:7 C) 2:1 D) 1:1