What is the molecular formula of a compound with empirical CH2O and vapour density of 90? [H = 1, C = 12, O = 16]

What is the molecular formula of a compound with empirical CH₂O and vapour density of 90? [H = 1, C = 12, O = 16]

A C₄H₈O ₂
B C₄H ₈O₃
C C₆H₁₀C₅
D C₆H₁₂O₆

waec 2009 chemistry

The correct answer is D. C₆H₁₂O₆

No explanation given

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