A chemist adds $0\mathrm{.}80L$ of a $2\mathrm{.}78{10}^{-7}mM$ mercury$($I$)$ chloride $(H{g}_{2}C{l}_2)$ solution to a reaction flask. Calculate the micromoles of mercury$($I$)$ chloride the chemist has added to the flask. Round your answer to $2$ significant digits.