I-bob. Kimyoning asosiy tushuncha va qonunlari. I modda miqdori.(mol)

IV. 31 4,8 gr metan (CH₄) dagi molekulalar sonini hisoblang.

Yechish. 1) har qanday moddaning 1 mol massasida 6,02∙10²³ ta molekula bo’ladi.

16 gr metanda ────── 6,02∙10²³ ta molekula bor

4,8 gr metanda ────── x=

3) x= = 1,806∙10²³ ta molekula bor. J:1,806∙10²³

32. 4,4 gr azot(I)-oksiddagi molekulalar sonini hosblang. J: 6,02∙10²²

33. 4,8 gr vodorod sulfiddagi molekulalar sonini hosblang. J:8,5∙10²²

34. 35,2 gr propandagi molekulalar sonini hosblang. J:4,816∙10²³ ta

35. 54 gr etandagi molekulalar sonini hosblang. J:10,836∙10²³

36. 12 gr ozondagi molekulalar sonini hosblang. J:1,505∙10²³ ta

37. 7,8 gr asetilendagi molekulalar sonini toping. J:1,806∙10²³ ta

38. 12 gr mochevina (CO(NH₂)₂) dagi molekulalar sonini toping. J:1.204∙10²³ ta

39. 85,2 gr dekan (C₁₀H₂₂) dagi molekulalar sonini hisoblang. J:3,612∙10²³ ta

40. 20 gr geptan (C₇H₁₆) dagi molekulalar sonini toping. J:1.204∙10²³ ta