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# If the Empirical Formula of a Compound is Ch and It Has a Vapor Density of 13, Find the Molecular Formula of the Compound. - ICSE Class 10 - Chemistry

ConceptDeduction of Simple (Empirical) and Molecular Formula from the Percentage Composition of a Compound

#### Question

If the empirical formula of a compound is CH and it has a vapor density of 13, find the molecular formula of the compound.

#### Solution

Given:

Empirical formula = CH

Vapour density = 13

Molecular weight = 2 × Vapour density

= 2 × 13

= 26

∴ Empirical formula of a compound with molecular mass 26 is CH.

n = "Molecular mass"/"Empirical formula" = 26/(12+1) = 26/13 = 2

∴ Molecular formula of the given compound is 2 × (CH) = C2H2 = CH ≡ CH.

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Solution If the Empirical Formula of a Compound is Ch and It Has a Vapor Density of 13, Find the Molecular Formula of the Compound. Concept: Deduction of Simple (Empirical) and Molecular Formula from the Percentage Composition of a Compound.
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