Mol-bu ... . 1) 1 gr moddadagi zarrachalar soni; 2) 12C 1 izotopining

50. (v19/20-109-1) Mol-bu ... . 1) 1 gr moddadagi zarrachalar soni; 2) 12C 1 izotopining massasini — qismi; 3) kimyoda modda miqdorini olchaydigan birlik; 4) 22,4 litr gazdagi molekulalar soni, normal sharoitda. A) 2 B)3
C) 4
D) 1