KCET2013ChemistrySome Basic Concepts of Chemistry

Empirical formula of a compound is CH ₂ O and its molecular mass is 90 , the molecular formula of the compound is

Options

AC ₃ H ₆ O ₃
BC ₂ H ₄ O ₂
CC ₆ H ₁₂ O ₆
DCH ₂ O

Correct answer

A. C ₃ H ₆ O ₃

Step-by-step solution

The empirical formula of compound = CH ₂ O Empirical formula mass =(1 12)+(2 1)+(1 16)=30 Molecular mass =90 n= Molecular mass Empirical mass = 90 30 =3 and molecular formula =3 CH ₂ O = C ₃ H ₆ O ₃

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