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

III. 23. 5,2 gr nomalum modda 0,2 mol kelsa,nomalum modda molekulyar massasini toping.

Yechish; 1) quyidagi fo’rmula bo’yicha molekulyar massani topamiz.

Mr = = = 26 gr J:26

24. 4,9 gr nomalum modda 0,05 mol kelsa,shu moddani Mr ni toping. J:98

25. 39 gr nomalum modda 0,5 mol kelsa,shu moddani massasini toping. J:78

26. nomalum moddaning 0,25 moli 14 gr kelsa,shu moddaning Mr ni toping. J:56

27. 27,3 gr nomalum modda 0,35 mol bo’lsa,moddaning Mr ni toping. J:78

28. 0,3 mol moddaning massasi 36 gr bo’lsa,shu moddaning molekulyar massasini toping. J:120

29. Berk idishga 14 gr yarim mol gaz berkitilgan. Shu idish ichidagi noma’lum gaznining molekulyar massasini aniqlang. J:28

30. 36 gr nomalum moddaning 0.45 molining molekulyar massasini toping. J:80

31. Berk idishga 22 gr yarim mol gaz berkitilgan. Shu idish ichidagi noma’lum gazni aniqlang. J:44

32. 18,9 gr nomalum moddaning miqdori 0,3 mol bo’lsa,shu moddaning molekulyar massasini toping. J:63