Hidrocacbon có dạng \(C_xH_y\)
\(C_xH_y+\left(x+\frac{y}{4}\right)O_2\rightarrow xCO_2+\frac{y}{2}H_2O\)
Ta có:
\(V_X=200\left(ml\right);V_{CO2}=400\left(ml\right)\)
\(V_{H2O}=200\left(ml\right)\)
Theo phản ứng:
\(x=\frac{V_{CO2}}{V_X}=\frac{400}{200}=2\)
\(y=\frac{2V_{H2O}}{V_X}=\frac{200.2}{200}=2\)
Vậy CTPT là \(C_2H_2\)