Gọi số mol 2 chất lần lượt là a,b (mol)
\(n_{khí}=\frac{4,48}{22,4}=0,2\left(mol\right)\)
PTHH: \(CaCO_3+2HCl\rightarrow CaCl_2+CO_2+H_2O\)
________a----------------------------------->a____________(mol)
\(Mg+2HCl\rightarrow MgCl_2+H_2\)
b-------------------------------->b____(mol)
=> \(\frac{44a+2b}{a+b}=23\)
Mà a+b=0,2
=> \(\left\{{}\begin{matrix}a=0,1\left(mol\right)\\b=0,1\left(mol\right)\end{matrix}\right.\)
=> \(m=100.0,1+24.0,1=12,4\left(g\right)\)