I kimyoning asosiy tushuncha va qonunlari

14. Tarkibida 1,5•10²³ ta kislorod atomi bo‘lgan magniy gidroksidning massasini aniqlang.
A) 5,71 B) 6,5 C) 7,2 D) 14,5


15. 150 g NH₃ dagi azot atomlarining soni 150 g ammoniy sulfatdagi azot atomlarining sonidan necha marta ko‘p?
A) 2,3 B) 3,1 C) 3,88 D) 11,65


16. 100 g NH₃ dagi vodorod atomlarining soni 100 g ammoniy sulfatdagi vodorod atomlarining sonidan necha marta ko‘p?
A) 2,3 B) 2,91 C) 3,5 D) 11,65


17. 1,5 mol CaCO₃ da nechta Ca va O atomlari bor. A) 9,03•10^-23 va 27,09•10^-23
B) 6,03•10^-23 va 4,03•10^-24
C) 12,03•10^-23 va 9,03•10^-23
C) 24,08•10^-23 va 9,03•10^-23

18. Noma’lum massali malaxitdagi molekulalar soni bilan atomlar sonining farqi 8,127·10²³ ga teng bo’lsa, malaxit massasini (g) toping.

A)42,18 B)33,3 C)22,2 D)30

19. Noma’lum massali malaxitdagi( (CuOH)₂ CO₃) molekulalar soni bilan atomlar sonining farqi 13,545·10²³ ga teng bo’lsa, malaxit massasini (g) toping.

A) 93,24 B) 42,18 C) 55,5 D) 30


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1. 52,2 g Bariy nitratdagi azot atomlarining soni nechta?
A) 2,0 •10²² B)2,4•10²³ C)2,9 •10²³ D) 2,5•10²²


2. 3,5 mol kadmiy tarkibida nechta atom mavjud?

A) 1,2•10²⁴ B)2,4•10²⁴ C) 6,0•10²³ D) 2,1•10²⁴

3. 0,04 mol litiy oksiddagi litiy atomlari sonini toping.
A) 4,8 •10²² B) 6,02 •10²³ C)2,4 •10²² D) 3 •10²³


4. 2 mol suvda nechta vordorod atomi bor?
A) 6 • 10²⁴ B) 12 • 10²³ C) 24 •10²³ D) 3 • 10²⁴


5. Massasi 615 g bo‘lgan magniy sulfat kristallogidratida tuz molekulalarining suv molekulalariga nisbati 1:7 bo‘lsa, undagi kislorod atomlari sonini toping.
A) 24,08•10²³ B) 18,06•10²³
C) 1,65•10²⁵ D) 17,5•10²³


6. Massasi 340 g bo‘lgan sulfat kislota kristallogidratida, kislota molekulalarining suvmolekulalariga nisbati 1:4 bo‘lsa, undagi kislorod atomlari sonini toping.
A) 24,08•10²³ B) 18,06•10²³
C) 15,05•10²³ D) 96,32•10²³


7.Massasi 0,858 kg bo‘lgan natriy karbonat kristallogidratida, tuz molekulalarining suv molekulalariga nisbati 1:10 bo‘lsa, undagi kislorod atomlari sonini toping.
A) 24,08•10²³ B) 18,06•10²⁵
C) 23,478•10²⁴ D) 96,32•10²³


8. Bir tomchi suv (v=0,03 ml) da nechta molekula bo‘ladi?
A) 8•10²⁰ B) 1•10²¹ C ) 6•10²³ D) 2•10²⁰


9. Bir tomchi suv 0,033 ml bo‘lsa, 50 tomchi suvda nechta molekula bo‘ladi?
A) 8,2•10²⁰ B)5,5 •10²² C) 6,02•10²³ D) 2•10²⁰


10. Bir tomchi etil spirti 0,033 ml bo‘lsa, 30 tomchi spirtda nechta molekula bo‘ladi? (ρ=0,90 g/ml)
A) 11,66 •10²¹ B) 3,01•10²¹ C)6•10²³ D) 2•10²⁰


11. Uglerod (II) oksidning nechta molekulasi 16 g bo‘ladi?
A) 1,5•10²³ B) 2,0•10²³
C) 1,2•10²³ D) 3,44•10²³


12. 0,04 mol natriy oksiddagi natriy atomlari sonini toping.
A) 4,8 •10²² B) 6,02 •10²³
C) 2,4 •10²² D) 3 •10²³


13. 6,96 g Fe₂(SO₄)₃ 10H₂O da nechta vodorod atomi bor?
A) 44•10²² B) 13,2•10²²
C) 14,4•10²² D) 16•10²²


14. Hajmi 1l bo‘lgan suv( ) tarkibidagi molekulalar soni nechta?
A) 6,02•10²³ B) 3,34•10²⁴
C) 3,34•10²⁵ D) 6,02•10²⁶


15. Massasi 50 g tanga tarkibida 20 % nikel metali bo‘lsa, undagi metall atomlari sonini hisoblang?
A) 1,02 •10²³ B) 1,60•10²³
C) 10,8 •10²² D) 4,4•10²²


16. Zarrachalari soni Avogadro sonidan 4 marta kam bo`lgan moddani toping.
A) 6gr magniy B) 1gr vadarod
C)9gr kislarod D) 16gr kalsiy


1.Atomlar soni teng bo`lgan argon, azot va silan gazlari aralashmasi bor. Shu aralashmaning 1,7 molidagi argonning (n.sh.) dagi xajmini (l) toping. (J:22,4)