$CH_3CHO+2AgNO_3+3NH_3\rightarrow CH_3COONH_4+2Ag\downarrow+2NH_4NO_3$$RCHO+2AgNO_3+3NH_3\rightarrow RCOONH_4+2Ag\downarrow+2NH_4NO_3$
$C_6H_5OH+KOH\rightarrow C_6H_5OK+H_2O$
$C_6H_5OH+3Br_2\rightarrow C_6H_2Br_3OH\downarrow+3HBr$
$C_6H_5OH+3HNO_3\overset{H_2SO_4,dn}{\rightarrow}C_6H_2(NO_2)_3OH+3H_2O$
$*)C_\overline{n}H_{2\overline{n}+2}+(1,5\overline{n}+0,5)O_2\rightarrow \overline{n}CO_2+(\overline{n} +1)H_2O $
$1 (1,5\overline{n}+0,5 )$
$\frac{7,4}{14\overline{n}+2 } 7,1$
$\Rightarrow 99,4\overline{n}+14,2=11,1\overline{n}+3,7\Rightarrow \overline{n} <0\Rightarrow ..........??? $