\(CaCO_3-^{t^o}\rightarrow CaO+CO_2\)
\(TheoPT:n_{CaCO_3}=n_{CaO}=\dfrac{2}{56}=\dfrac{1}{28}\left(mol\right)\)
\(VìH=90\%\Rightarrow n_{CaCO_3}=\dfrac{1}{28}.\dfrac{100}{90}=\dfrac{5}{126}\left(mol\right)\\ \Rightarrow m_{CaCO_3}=\dfrac{5}{126}.100=\dfrac{250}{63}\left(tấn\right)\)
Vì CaCO3 chiếm 80% đá vôi => \(m_{đávôi}=\dfrac{250}{63}.\dfrac{100}{80}=4.96\left(tấn\right)\)