Question

What is the empirical formula of benzene, C6H6?

I know how to find empirical formula; as long as you know the moles, you can find the ratio and thus the empirical formula. But the question provides nothing and I can only find the Mr?
The answer from the answer booklet is CH.

How is this answer obtained?
bobpursley
empirical: CH
Empirical is the lowest whole ratio of atoms.

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