CxHyNzOv

w$C$ = $x\ast M(C)/M(CxHyNzOv)$*100%, w$H$ = $y\ast M(H)/M(CxHyNzOv)$*100%,

w$N$ = $z\ast M(N)/M(CxHyNzOv)$*100%, w$O$ = $v\ast M(O)/M(CxHyNzOv)$*100%

x = $M(CxHyNzOv)\ast w(C)$/$M(C)\ast 100$ = $123\ast 58,5$/$12\ast 100$ ≈ 6

y = $M(CxHyNzOv)\ast w(H)$/$M(H)\ast 100$ = $123\ast 4,1$/$1\ast 100$ ≈ 5

z = $M(CxHyNzOv)\ast w(N)$/$M(N)\ast 100$ = $123\ast 11,4$/$14\ast 100$ ≈ 1

v = $M(CxHyNzOv)\ast w(O)$/$M(O)\ast 100$ = $123\ast 26$/$16\ast 100$ ≈ 2

Формула вещества C6H5NO2