Chemistry 0620 · IGCSE · Formulae, functional groups and terminology

Formulae, functional groups and terminology — practice question

A hydrocarbon has the formula $C_xH_y$. Its complete combustion is represented by the equation below. $C_xH_y + 8O_2 \rightarrow 5CO_2 + 6H_2O$ What are the values of $x$ and $y$?

  • A$x=5$, $y=6$
  • B$x=5$, $y=12$
  • C$x=6$, $y=5$
  • D$x=12$, $y=5$

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