Trong MOx
%O=\(\frac{16x}{\text{(M+16x}}\)=50% \(\rightarrow\) M=16x thỏa mãn x=2 \(\rightarrow\) M=32\(\rightarrow\) S
\(\rightarrow\)MOx là SO2
Ta có: M SO2=64=4M RHy \(\rightarrow\) MRHy=16
%H trong RHy=\(\frac{y}{16}\)=25% \(\rightarrow\)y=4 \(\rightarrow\)R+4=16 \(\rightarrow\)R=12 \(\rightarrow\)C
\(\Rightarrow\)CH4