\(MCO3+H2SO4--.MSO4+H2O+CO2\)
\(n_{MCO3}=\frac{12,4}{M+60}\left(mol\right)\)
\(n_{MCl2}=\frac{16}{M+96}\left(mol\right)\)
Theo pthh
\(n_{MSO4}=n_{MCO3}\Rightarrow\frac{16}{M+96}=\frac{12,4}{M+60}\)
\(\Leftrightarrow16M+960=12,4M+1190,4\)
\(\Leftrightarrow1,8M=230,4\)
\(\Rightarrow M=128\)
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