because of its unusual property Jof existing as a liquid at room temperature. One process by which mercury is produced industrially is through the heating of its common ore cinnabar $($mercuric sulfide, $HgS)$ with lime $($calcium oxide, CaO $).$

$4HgS(s)+4$CaO$(s)4Hg(l)+3$CaS$(s)+CaS{O}_4(s)$

What mass of mercury would be produced by complete reaction of $11\mathrm{.}5kg$ of $HgS?$

$kg$