Mol-bu ... . 1) 1 g moddadagi zarrachalar soni; 2) 12C 1 izotopi massa

42. (V18-1-90) Mol-bu ... . 1) 1 g moddadagi zarrachalar soni; 2) 12C 1 izotopi massasining — qismi; 3) kimyoda modda miqdorini olchaydigan birlik; 4) 22,4 litr gazdagi molekulalar soni, normal sharoitda. A) 2 B)3
C) 4
D) 1