\(n_{CaCO_3}=\dfrac{100}{100}=1\left(mol\right)\); \(n_{NaOH}=\dfrac{80}{40}=2\left(mol\right)\)
PTHH: CaCO3 + 2HCl --> CaCl2 + CO2 + H2O
1---------------------------->1
Xét tỉ lệ: \(\dfrac{n_{NaOH}}{n_{CO_2}}=\dfrac{2}{1}=2\) => Tạo ra muối Na2CO3
PTHH: 2NaOH + CO2 --> Na2CO3 + H2O
=> \(n_{Na_2CO_3}=1\left(mol\right)\)
=> \(m_{Na_2CO_3}=1.106=106\left(g\right)\)