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Un fenol monohidroxilic contine 13,11%O. Determina formula moleculara.

Răspuns :

CnH2n-6O - fenol monohidroxilic
%O = m O/m fenol * 100
M fenol = 12n+2n-6+16 = 14n+10
13,11 = 16/(14n+10) * 100
1600 = 183,54n + 131,1
n = 8
C8H10O