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

4. Massasi 4,4 gr bo’lgan uglerod (IV) oksidda qancha miqdor (mol) modda bor? A) 1 B) 0,1 C) 0,01 D) 2

5. Bir tomchi suv (ν= 0,03ml) da nechta molekula bo’ladi? A) 8∙10²⁰ B) 3∙10²¹ C) 6∙10²³ D) 1∙10²¹

6. Mis(II)oksidining nechta molekulasi 16 g bo’ladi? A) 1,5∙10²³ B) 2∙10²³ C) 1,2∙10²³ D) 2,2∙10²³

7. 8 g vodorod bilan 8 g kislorod aralashtrilib yondirilganda hosil bo’lgan suvning massasini toping. A) 9 B) 8 C) 10 D) 16

8. 1,505∙10²⁴ ta suv molekulalarining massasini (g) va 6,02∙10²² ta suv molekulalarining miqdorini (mol) hisoblang. A ) 36; 0,01 B) 40; 1,0 C) 45; 0,1 D) 0,45; 10

9. Necha gramm geliydagi molekulalar soni 4,5 g suvdagi molekulalar soniga teng bo’ladi? A) 4 B) 3 C) 2 D) 1

10. Odam tanasining 72% ni kislorod tashkil etsa, og’rligi 70 kg bo’lgan tanadagi kislorodning atomlari soni va miqdori qanchaga teng bo’ladi? A)3100; 2∙10²⁷ B) 1,9∙10²⁷ ; 3,15∙10³ C) 1575; 19∙10²⁷ D) 9,5∙10³; 1,9∙10²⁷

11. Kalsiy karbanatning qanday massasida (g) 32g metandagiga teng uglerod atomlari bor? A) 100 B) 300 C) 200 D) 240