The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a person's blood stream is
$2{K_2}C{r_2}{O_7} + 8{H_2}S{O_4} + 3{C_2}{H_6}O \to 2C{r_2}{(S{O_4})_3} + 3{C_2}{H_4}{O_2} + 2{K_2}S{O_4} + 11{H_2}O$
If the rate of appearance of Cr₂(SO₄)₃ is 2.67 mol min^$-$1 at a particular time, the rate of disappearance of C₂H₆O at the same time is _____________ mol min^$-$1. (Nearest integer)