CaCO3 \(\underrightarrow{to}\) CaO + CO2 (1)
\(m_{CaCO_3}=150\times\left(100\%-20\%\right)=120\left(g\right)\)
\(n_{CaCO_3}=\dfrac{120}{100}=1,2\left(mol\right)\)
a) Theo PT1: \(n_{CaO}=n_{CaCO_3}=1,2\left(mol\right)\)
\(\Rightarrow m_{CaO}=1,2\times56=67,2\left(g\right)\)
b) Theo PT1: \(n_{CO_2}=n_{CaCO_3}=1,2\left(mol\right)\)
\(\Rightarrow V_{CO_2}=1,2\times22,4=26,88\left(l\right)\)
c) CaO + H2O → Ca(OH)2 (2)
Theo PT2: \(n_{Ca\left(OH\right)_2}=n_{CaO}=1,2\left(mol\right)\)
\(\Rightarrow m_{Ca\left(OH\right)_2}=1,2\times74=88,8\left(g\right)\)