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Question

The emperical formula of a compound is CH2O and its molecular weight is 90. What is the molecular formula of the compound?

A
C2H2O2
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B
C2H4O2
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C
CH2O2
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D
C3H6O3
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Solution

The correct option is D C3H6O3
Molecularformula=n×empericalformula
n=Molecular formula weightemperical formula weight
Emperical formula weight of CH2O is 30 (12+2+16)
Molecular formula weight is 90
So,
n=9030=3
Molecular formula=3×CH2O
Hence molecular formula is C3H6O3
Option D is correct answer.

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