Chemistry 9701 · AS & A Level · Atoms, molecules and stoichiometry

Atoms, molecules and stoichiometry — practice question

The diagram illustrates the skeletal formula of phenazine. What is the empirical formula for phenazine?

  • A$\text{C}_6\text{H}_4\text{N}$
  • B$\text{C}_6\text{H}_6\text{N}$
  • C$\text{C}_{12}\text{H}_8\text{N}_2$
  • D$\text{C}_{12}\text{H}_{12}\text{N}_2$

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