Gr karbonat angidriddagi co

1.220 gr karbonat angidriddagi (CO₂) modda miqdorini aniqlang A) 1,25 mol B) 2,5 mol C) 3,75 mol D) 5 mol

2. 0,11 mol miqdordagi taxir (MgS0₄*7H₂O ) tuz massasini hisoblang A) 27,06 gr B) 100 gr C) 67,06 gr D) 44 gr

3. Br ning valentligi keltirilgan qatorni belgilang? A) I,II,V,VI,VII B) I,III,V,VII C) I,III,V,VIII D) III,V,VII,II

4. Na₃PO₄ nisbiy molekulyar massasini toping? A) 164g/mol B) 905 C) 133 D) 100

5. Agar n.sh.da 6,4 g gaz 4,48 / hajmni egallasa, shu gazning nisbiy molekulyar massasini aniqlang? A)71 B)32 C)28 D)64

6. 0,3 mol miqdordagi bromid kislota (HBr) massasini hisoblang A) 114 gr В) 124 gr C) 24,3 gr D) 67,8 g

7. 0,47 mol miqdorining massasi 47 gr bo‘lgan moddani toping A) sulfat kislota B) fosfat kislota C) perxlorat kislota D) kalsiy karbonat

8. 3 BaCl₂ tarkibida nechta molekula va atomlar bor? A) 3ta molekula,6ta atom B) 2ta molekula,5ta atom C)3ta molekula,9ta atom D) 3ta molekula,3ta atom

9. Fe₂O₃ tarkibida nechta bog’( chiziqlar) bor? A) 4 B) 5 C) 6 D) 7

10. 1,5 mol natriy ishqori va 28 g kaliy ishqoridan iborat aralashmani miqdor yig‘indisini (mol) toping. A) 88 B) 68 C) 2,5 D) 2

11. Ma’lum bir gazning hajmi 168 / ni tashkil etsa, uning normal sharoitdagi miqdorini (mol) aniqlang? A) 1,25 B) 2,45 C) 3,75 D) 7,5

12. II,III,VI valentli elementni ko’rsating? A) Mn B) Mo C) Fe D) As

13. Rubidiy oksidi formulasini toping? A) Rb₂O B) RbO₂ C) Rb₂O₂ D) RbO

14. 1,1 gr uglerod (IV) oksidini miqdorini aniqlang? A) 0,025 B) 0,572 C) 0,78 D) 2,86

15. Astat atomidagi electron, proton va neytronlar yig’indisini toping. A) 295 B) 335 C) 108 D) 420

16. Qanday miqdordagi (mol) temir moddasi 120 gr temir(III) oksidida bo'ladi? A) 2,0 B) 1,0 C) 1,5 D) 0,75

17. Ammiak gazini ko’rsating. A) N₃H B) H₃N C) NH₃ D) HN₃

18. Neytroni 45 ga teng bo’lgan elementni ko’rsating. A) Rh B) Se C) Zn D) As

19. Agar metallning 13 gramining miqdori 0,25 mol kelsa, shu metallni aniqlang? A) Cr B) Mn C) Fe D) Co