\(\mathrm{CxHy}+\left(\mathrm{x}+\frac{\mathrm{y}}{4}\right) \mathrm{O}_2 \rightarrow \mathrm{xCO}_2+\frac{\mathrm{y}}{2} \mathrm{H}_2 \mathrm{O}\)
\(\text { 10x } 5 \mathrm{y}\)
\(10 x=40\)
\(\mathrm{x}=4\)
\(5 y=50\)
\(\mathrm{y}=10\)
\(\mathrm{C}_4 \mathrm{H}_{10}\)
[ઉપયોગ: પરમાણ્વીય દળ:$Na:23.0\,u {O}: 16.0 \,{u} \quad {H}: 1.0 \,{u}$, ઘનતા ${H}_{2} {O}: 1.0 \,{~g} \,{~cm}^{-3}$ ]