1. Atom-molekulyar ta’limot. Kimyoning dastlabki tushunchalari. Molekula bu…

43. 2 mol suvda nechta vodorod atomi bor? A) 6∙10²⁴ B) 12∙10²³ C) 24∙10²³ D) 3∙10²⁴

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

45. Tarkibida 1,5∙10²³ ta kislorod atomi bo’lgan magniy gidroksidning massasini aniqlang A) 5,3 B) 6,5 C) 7,2 D) 14,5

46. 52,2 g bariy nitratdagi azot atomlarining soni nechta? A) 2∙10²² B) 2,4∙10²³ C) 2,9∙10²³ D) 2,5∙10²²

47. Massasi 615 g bo’lgan magniy sulfat kristallagidratida tuz molekulalarining suv molekulalariga nisbati 1:7 bo’lsa, undagi kislorod atomlari sonini toping. A) 11 B) 27,5 C) 15∙10²³ D) 1,65∙10²⁵

48. Xajmi 1 litr bo’lgan suv ( p=1g/ml) tarkibdagi molekulalar soni nechta? A) 6,02∙10²³ B) 3,34∙10²⁴ C) 3,34∙10²⁵ D) 6,02∙10²⁶

49. Massasi 5 g tanga tarkibida 24% nikel metali bo’lsa, undagi metal atomlari sonini hisoblang? A) 1,0∙10²³ B) 1,6 ∙10²³ C) 0,8 ∙10²² D) 1,2∙10²²

50. Dengiz suvining bir tomchisida 50 milliardga yaqin oltin atomlari bor. Dengiz suvidan 30 tomchisining massasini 1 g deb olib, dengiz suvining bir tonnasidagi oltinning massasini (g) hisoblab toping. A) 1,5∙10^-5 B) 0,05 C) 4,9∙10^-4 D) 0,00005

51. Dengiz suvining bir tomchisda 50 milliardga yaqin oltin atomlari bor. Dengiz suvidan 16 tomchisining massasini 1 g deb olib, dengiz suvining 100 tonnasidagi oltinning massasini (g) hisoblab toping. A) 0,026 B) 0,15 C) 3∙10^-6 D) 0,00003