\(n_{CaO}=\dfrac{224}{56}=4\left(mol\right)\)
\(CaCO_3\underrightarrow{^{^{t^o}}}CaO+CO_2\)
\(4................4\)
\(m_{CaCO_3}=4\cdot100=400\left(g\right)\)
\(H=\dfrac{400}{500}\cdot100\%=80\%\)
PTHH: CaCO3 to→��→ CaO + CO2
Theo PT: 100g → 56g
Theo bài: 500g → x (g)
⇒H=mCaOttmCaOlt×100%=224280×100%=80%