CH2=CH2+HBr=CH3-CH2-Br

CH3-CH2-Br+H2O=CH3-CH2-OH+HBr

CH3-CH2-OH+CuO=Cu+CH3COH+H2O

CH3COH+Ag2O=2Ag+CH3COOH

CH3COOH+CH3OH=CH3COOCH3+H2O

C6H5OH+Br2--->C6H5BrO +HBr

m(C6H5OH)=235g/94g/mol=2,5mol

m(C6H5BrO)=2,5mol*173g/mol=432,5g

w(C6H5BrO)=100%-20%=80%=0,8

m(C6H5BrO)чистый=432,5g*0,8=346g

CH2 = CH2 + HBr ----> CH3 - CH2Br
CH3 - CH2Br +  NaOH ---> CH3 - CH2OH + NaBr
CH3 - CH2OH + CuO --(t)-> CH3 - CHO + Cu + H2O
5CH3 - CHO + 2KMnO4 + 3H2SO4 --(t)---> 5CH3 - COOH + K2SO4 + 2MnSO4 + 3H2O
CH3 - COOH + CH3OH ----> CH3 - COO - CH3 + H2O