Fizik masala qanday yechiladi?

25. 54 g suvda, 2 g vodorodga nisbatan necha marta ko‘p molekulalar bor?
A) 4 B) 3 C) 2 D) 1,5
26. Ideal gazning bitta molekulasining mas­sasi 5,310^26 kg ga teng. Shu gazning molyar massasini hisoblang (g/mol).
A) 29 B) 32 C) 8 D) 12
27. Massasi 11,87 kg bo‘lgan qalay bo‘lagi­da qancha atom bor? Qalayning molyar massasi M=118,7 g/mol.
A) 6·10²⁴ B) 6·10²³ C) 6·10²⁶ D) 6·10²⁵
28. Massasi 310^-5 g bo‘lgan suv tomchisida nech­ta molekula bor?
A) 10¹⁸ B) 10²¹ C) 210²⁸ D) 510¹⁸
29. Agar misning har bir atomiga bittadan erkin elektron to‘g‘ri kelsa, tok tashuvchi elek­tronlar konsentratsiyasi (m^3) qanday? =8,910³ kg/m³; M=6410^3 kg/mol.
A) 8,310²⁸ B) 6,4.10²³ C) 4,510²⁸ D) 3,110²³
30. To’rt mol suv qancha hajmni egallaydi. (sm³)?
A) 2 B) 72 C) 64 D) 18
31. Agar kislorod gazining idishdagi zichli­gi 0,32 kg/m³ ga teng bo‘lsa, gaz molekulalari konsentratsiyasini toping (m^3).
A) 610²⁰ B) 610²³ C) 610²⁴ D) 610²⁵
32. Massalari teng bo‘lgan vodorod va kislo­rod­dagi molekulalar soni necha marta farq qiladi? M(O₂)= 32 g/mol; M(N₂)=2 g/mol.
A) 64 B) 32 C) 16 D) 18
33. Hajmlari bir xil bo‘lgan suv N_S va muz­dagi N_M molekulalar sonini taqqoslang.
A) 1 B) 1,1 C) 2 D) 2
34. Molekulalar soni 310²³ bo‘lgan azotning massasini hisoblang (g). M=28 g/mol
A) 168 B) 14 C) 56 D) 28
35. Agar 18 mg suv 6 s da bug‘lansa, 1 s da suv sirtidan o‘rtacha nechta molekula uchib ketadi?
A)110²⁰ B)110²³ C)410¹⁹ D) 210¹⁸