:For the following reaction

CaO$(s)+H_{2}O(l)Ca(OH{)}_2(s),H=-64\mathrm{.}8kJ$

$?$How many moles of CaO must be reacted by this reaction to release $1050kJ$ of heat

$($Atomic mass of $Ca$ is $40\mathrm{.}078,O$ is $15\mathrm{.}999)$

mol $17.$a

mol$12.b$

mol $21$ c

mol $907,$d