I modda miqdori

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


VI. 41. 2,22 gr malahid (Cu(OH)₂∙CuCO₃) dagi kislorod atomlar sonini toping.
Yechish; 1) Cu(OH)₂∙CuCO₃ = 5 ta kislorod atomi bor yoki (5∙6,02∙10²³) 30,1∙10²³ ta atom bor.malahit molekulyar massasi 222 gr.ga teng.
2) 222 gr da ────── 30,1∙10²³ ta kislorod atomi bor
2,22 gr da ────── x=
x= = 3,01∙10²² ta kislorod atomi bor. J: 3,01∙10²²
42. 75,6 gr ammoniy bixromat ((NH₄)₂Cr₂O₇) dagi azot atomlari sonini hisoblang. J:3,612∙10²³ ta
43. 127,2 gr kaliy fosfat (K₃PO₄) dagi kislorod atomlari sonini hisoblang.J:14,448∙10²³
44. 22 gr kaliy permanganat (KMnO₄) dagi kislorod atomlar sonini toping. J:3,35∙10²³
45. 17 gr zar suvi (HNO₃∙3HCl) dagi xlor atomlar sonini toping. J:1,78∙10²³
46. 28,4 gr glauber tuzi (Na₂SO₄∙10H₂O) dagi natriy atomlar sonini toping.J:1,06∙10²³
47. 10 gr silvinit (KCl∙NaCl) dagi xlor atomlar sonini toping. J:9,05∙10²²
48. 25 gr mis kuporosi (CuSO₄∙5H₂O) dagi kislorod atomlar sonini toping. J:5,418∙10²³
49. 55,2 gr xalkopirit (CuFeS₂) dagi temir atomlar sonini toping. J:1,806∙10²³
50. 30 gr gips (CaSO₄∙2H₂O) dagi vodarod atomlar sonini toping. J:4,2∙10²³