3. 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 based on the 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 standard chromatogram (ethylbenzene), mm2; kx is the correction factor for toluene; kst is the correction factor for the standard.

Option # 3
A, g 8.5412
B, g 1.0865
Sx, mm2 55.3
kx 1.01
Sst, mm2 80.1
kst 1.02

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