I. Kimyoning asosiy tushunchalari. Atom

2-Tur masalalar:
1. 2,22 gr malahiddagi kislorod atomlar sonini toping.

A) 3,01• 10²¹ B) 3,01• 10²² C) 3,612∙10²³ D) 14,448∙10²³

2. 75,6 gr ammoniy bixromatdagi azot atomlari sonini hisoblang.

A) 3,01• 10²¹ B) 3,01• 10²² C) 3,612∙10²³ D) 14,448∙10²³

3. 127,2 gr kaliy fosfatdagi kislorod atomlari sonini hisoblang.

A) 3,01• 10²¹ B) 3,01• 10²² C) 3,612∙10²³ D) 14,448∙10²³

4. 22 gr kaliy permanganatdagi kislorod atomlar sonini toping.

A) 3,35∙10²³ B) 3,01• 10²² C) 3,612∙10²³ D) 14,448∙10²³

5.17 gr zar suvidagi xlor atomlar sonini toping.

A) 1,06∙10²³ B) 1,78∙10²³ C) 9,05∙10²² D) 5,418∙10²³

6.28,4 gr glauber tuzidagi natriy atomlar sonini toping.

A) 1,06∙10²³ B) 1,78∙10²³ C) 9,05∙10²² D) 5,418∙10²³

7. 10 gr silvinitdagi xlor atomlar sonini toping.

A) 1,06∙10²³ B) 1,78∙10²³ C) 9,05∙10²² D) 5,418∙10²³

8. 25 gr mis kuporosidagi kislorod atomlar sonini toping.

A) 1,06∙10²³ B) 1,78∙10²³ C) 9,05∙10²² D) 5,418∙10²³

9. 55,2 gr xalkopiritdagi temir atomlar sonini toping.

A) 1,06∙10²³ B) 1,78∙10²³ C) 9,05∙10²² D) 5,418∙10²³

10. 30 gr gipsdagi vodarod atomlar sonini toping.

A) 4,2∙10²³ B) 1,78∙10²³ C) 9,05∙10²² D) 5,418∙10²³

11. 18,06 • 10²² ta vodorod atomi tutgan fosfat kislota massasi, litiyning massasidan necha (gr) gako’p

A) 9,8 B) 7 C) 2,8 D) 3,2

12. 0,8 mol silan tarkibidagi vodorod atomlariga teng sonda atom tutgan is gazini massasini toping.

A) 28 B) 29,2 C) 22,4 D) 44,8

13. 4,48 l (n.sh) etan (C₂H₆) ning massasiga teng bo’lgan kisloroddagi atomlar sonini hisoblang.

A) 2,25∙10²³ B) 1,05∙10²³ C) 3,36∙10²³ D) 2,5∙10²⁰

14.3,36 l oltingugurt(IV)-oksid (SO₂) bilan teng og’irlikdagi oltingugurt

(VI)-oksid(SO₃) tarkibidagi kislorod atomlari sonini hisoblang.

A) 2,167∙10²³ B) 1,05∙10²³ C) 3,36∙10²³ D) 2,5∙10²⁰

15.Necha gr geliy (He) dagi molekulalar soni 4,5 gr suvdagi molekulalar soniga teng bo’ladi.

A) 2 B) 4 C) 1 D) 0,25

16.5 g NH₃ dagi azot atomlarining soni 5 gr ammoniy sulfat ((NH₄)₂SO₄) dagi azot atomlarining sonidan necha marta ko’p.

A) 3,88 B) 6,25 C) 4 D) 3,6

17.0,3 mol N₂O dagi atomlar soniga teng miqdordagi atom tutgan is gazi (CO) dagi uglerod massasini gr toping.

A) 2,4 B) 5,4 C) 3,6 D) 8,8

18. 1 litr dengiz suvi tarkibida 0,000006 mg oltin mavjud. 1 km2 dengiz suvi tarkibidagi oltin atomlar sonini aniqlang.

A) 1,66 ∙ 10²² B) 1,83 ∙ 10²⁵ C) 1,83 ∙ 10²² D) 3,66 ∙ 10²⁵

■ KIMYOVIY FORMULA BO’YICHA HISOBLASH.