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mKOH=56u
mC6H5OH=94u
KOH + C6H5OH ---> C6H5OK + H2O
56g KOH ----- 94g C6H5OH
xg KOH ------- 1,88g C6H5OH
x = 1,12g KOH
m=1,12g
Cp=40%
mr=ms*100%/Cp
mr=1,12*100/40
mr=2,8g
m=2,8g
d=1,4g/cm3
v=m/d
v=2,8/1,4
v = 2cm3