1)C6H6+Cl2=C6H5Cl+HCl
1 1
C6H5Cl+KOH=C6H5OH+KCl
1 1
n(C6H6)=390:78=5моль;n(C6H5Cl)=5моль;тC6H5OH)=5моль;m(C6H5OH)=5*94=470г
470 -100%
410 -X%
X=87,23%
2)C6H5OH+3Br2=C6H2Br3OH+3HBr
1 1
n(C6H2Br3OH)=8,45:331=0,026моль;n(C6H5OH)=0,026моль;m(C6H5OH)=0,026моль*94г/моль=2,4г
w(C6H5OH)=2,4:240=0,01(1%)