39. Solving a chemistry problem

7. The reaction mass after nitration of toluene was analyzed by gas-liquid chromatography using ethylbenzene as an internal standard. Determine the percentage of unreacted toluene according to experimental data, if: A is the mass of toluene, g; B is the mass of added ethylbenzene, g; Sst is the peak area of the toluene chromatogram, mm2; Sx is the peak area of the chromatogram of the standard (ethylbenzene), mm2; kh is the correction factor of toluene; kst is the correction factor of the standard.


option number 7
A, g 9.6423
C, g 1.6824
Sx, mm2 111.3
kx 1.01
Sst, mm2 80.1
kst 1.02