A mixture of solid calcium oxide, CaO, and solid barium oxide, BaO, weighing $3\mathrm{.}145g$ is added to a $2\mathrm{.}00L$ flask containing carbon dioxide, $C{O}_2,$ at $30C.$ The CaO and BaO react completely with the carbon dioxide gas to form solid $CaC{O}_3$ and $BaC{O}_3,$ respectively. Calculate the moles of $C{O}_2$ consumed by the reaction if the initial pressure of $C{O}_2$ gas was $0\mathrm{.}796$ atm and the final pressure of $C{O}_2$ gas is $0\mathrm{.}394$atm.

moles of $C{O}_2$ :

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What is the mass percentage of CaO in the solid mixture?

mass percent CaO : $\%$

What is the mass percentage of BaO in the solid mixture?

mass percent BaO :

$\%$