The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a person's blood stream is 2 K_2 Cr_2 O_7+8 H_2 SO_4+3…

The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a person's blood stream is $$2 \mathrm{~K}_2 \mathrm{Cr}_2 \mathrm{O}_7+8 \mathrm{H}_2 \mathrm{SO}_4+3 \mathrm{C}_2 \mathrm{H}_6 \mathrm{O} \rightarrow 2 \mathrm{Cr}_2\left(\mathrm{SO}_4\right)_3+3 \mathrm{C}_2 \mathrm{H}_4 \mathrm{O}_2+2 \mathrm{~K}_2 \mathrm{SO}_4+11 \mathrm{H}_2 \mathrm{O} $$ If the rate of appearance of $\displaystyle \mathrm{Cr}_2\left(\mathrm{SO}_4\right)_3$ is $\displaystyle 2.67 \mathrm{~mol} \mathrm{~min}^{-1}$ at a particular time, the rate of disappearance of $\displaystyle \mathrm{C}_2 \mathrm{H}_6 \mathrm{O}$ at the same time is \_\_\_\_ $\displaystyle \mathrm{mol} \mathrm{~min}^{-1}$. (Nearest integer)