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150cm³=0,15dm³
d=1g/cm³=1000g/dm³
m=d*v
m=0,15*1000=150g
1:3
4g:12g
4g metanolu
12g etanolu
Cp met= 4g/154g *100% = 2,6%
Cp et = 12g/162g*100%=7,41%