1 tấn = 1000 kg
\(\rightarrow n_{C_6H_6}=\dfrac{1000}{78}=\dfrac{500}{39}\left(mol\right)\)
PTHH: C6H6 + HNO3 \(\overrightarrow{H_2SO_4đặc}\) C6H5NO2 + H2O
\(n_{C_6H_5NO_2\left(tt\right)}=\dfrac{500}{39}.80\%=\dfrac{400}{39}\left(mol\right)\)
\(\rightarrow m_{C_6H_5NO_2}=\dfrac{400}{39}.123=\dfrac{16400}{13}\left(g\right)\)