PTHH: \(CaCO_3\xrightarrow[]{t^o}CaO+CO_2\uparrow\)
Ta có: \(n_{CaCO_3}=\dfrac{10}{100}=0,1\left(mol\right)\) \(\Rightarrow n_{CO_2}=0,1\cdot80\%=0,08\left(mol\right)\) \(\Rightarrow\left\{{}\begin{matrix}V_{CO_2}=0,08\cdot22,4=1,792\left(l\right)\\m_{CO_2}=0,08\cdot44=3,52\left(g\right)\end{matrix}\right.\)
Bảo toàn khối lượng: \(m_{rắn}=m_{CaCO_3}-m_{CO_2}=6,48\left(g\right)\)