8 B)13 C) 5 D)

103. (v19/20-102-15) H2S + H2S04 + K2Cr207 -> Cr2(S04)3 + s + ... + H20 reaksiya tenglamasida chap tomondagi koeffitsiyentlar yigindisini aniqlang. A) 8 B)13
C) 5
D) 17