\(n_{RCl_n}=\dfrac{4,275}{M_R+35,5n}\)
\(R+nHCl\rightarrow RCl_n+\dfrac{1}{2}nH_2\)
\(\dfrac{4,275}{M_R+35,5n}\) \(\dfrac{4,275}{M_R+35,5n}\) ( mol )
\(\Rightarrow\dfrac{4,275}{M_R+35,5n}.M_R=1,08\)
\(\Leftrightarrow4,275M_R=1,08M_R+38,34n\)
\(\Leftrightarrow3,195M_R=38,34n\)
\(\Leftrightarrow M_R=12n\)
Biện luận:
n=1 => \(M_R\)=12 (Cacbon) ( loại )
n=2 => \(M_R\) =24 (Magie) ( nhận )
n=3 => Loại
Vậy R là Magie ( Mg )
R+nHCl→RCln+12nH2R+nHCl→RCln+12nH2
4,275MR+35,5n4,275MR+35,5n ( mol )