-> 2Cr 3+ (aq) +7H 2 0 2NH 3 + OH* ions m/z CH 3 OH + ' 32 h 2 o O.N. Of Cl = : -1 h 2 c=oh + 31 HC=0 + 29 H 3 C— OH* - ^ CH 3 OH + ' 32 h 2 c=oh + 31 HC=0 + 29 H 3 c + 15 1 00 u u 31 = 80 - n ■B 29 32 .