ધારો કે હાઇડ્રોકાર્બન \(=C_xH_y\)
\(\begin{array}{lll} C _1 H _3+ O _2 \longrightarrow & { }^2 CO _2+\frac{ y }{2} H _2 O _{( s )} \\ 0.5\,L & 2.5\,L & 3\,L \\ 0.5\,mol & 2.5\,mol & 3\,mol \\ 1\,mol & 5\,mol & 6\,mol \end{array}\)
\(\therefore x=5 \quad \frac{y}{2}=6 \Rightarrow y=12\)
\(\therefore\) અણુસૂત્ર \(= C _5 H _{12}\)