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Question

The molecular mass of butyric acid was determined by experiment to be 88 gmol1. What is the molecular formula?
Empirical formula=.C2H4O

A
C4H8O2
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B
C2H4O
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C
CH4O
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D
C2H4O2
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Solution

The correct option is A C4H8O2
Empirical formula mass =44
Molecular mass =88
we know,
Molecular massEmpirical mass=8844=2
Molecular formula =Empirical formula× n=C4H8O2

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