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Pheromones are compounds secreted by the...

Pheromones are compounds secreted by the females of many insect species to attract males. One of these compounds contains `80.78%` C, `13.56%` H, and `5.66%` O. A solution of `1.0g` of this substance in `8.50"cc"` of benzene freezes at `3.37^(@)C`. What are the molecular weight and molecular formula of the compound ?
(f.p. of `C_(6)H_(6)=5.5^(@)C`, `K_(f)(C_(6)H_(6))=5.12^(@)C//m`)

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The correct Answer is:
`282`, `C_(19)H_(38)O`
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