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Question

Chemistry Question on Some basic concepts of chemistry

A compound with empirical formula CH2OCH_2O has a vapour density of 3030. Its molecular formula is

A

C3H6O3C _{3} H _{6} O _{3}

B

C2H4O2C _{2} H _{4} O _{2}

C

C2H2O2C _{2} H _{2} O _{2}

D

C6H12O6C _{6} H _{12} O _{6}

Answer

C2H4O2C _{2} H _{4} O _{2}

Explanation

Solution

Molecular mass =2×=2 \times vapour density =2×30=60=2 \times 30=60 Empirical mass =12+2+16=30=12+2+16=30 ⇒n=6030=2\Rightarrow n=\frac{60}{30}=2 ⇒\Rightarrow Molecular formula is (CH2O)2≡C2H4O2\left( CH _{2} O \right)_{2} \equiv C _{2} H _{4} O _{2}