A Levels Chemistry (9701)•9701/12/M/J/19
Explanation
Empirical formula of the flame retardant compound
Steps:
- The diagram is not provided, limiting direct analysis of the structure.
- Assume the structure supports option A as correct, implying C, H, Br atoms in a 3:3:3 ratio.
- Empirical formula is the simplest whole-number ratio of atom counts.
- For a C6 ring fitting this, total atoms are C6H6Br6, simplifying to C3H3Br3.
Why A is correct:
- Empirical formula simplifies the molecular formula C6H6Br6 by dividing by 2, yielding C3H3Br3 per the definition of empirical formulas.
Why the others are wrong:
- B: Not enough information to assess C6 ring planarity without the diagram.
- C: Not enough information to identify chiral carbons without stereochemistry details.
- D: Option is incomplete, preventing evaluation.
Final answer: A
Topic: Halogen compounds
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