Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Choose the molecular formula of an oxide of iron in which the mass per cent of iron and oxygen are 69.9 and 
respectively and its molecular mass is 160 :?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
For element Fe, mole of atoms = 
= 
For element O, mole of atoms = 
Mole ratio of Fe 
Mole ratio of O = 
Simplest whole number ratio of Fe and O = 2, 3
Empirical formula of compound = 
Molecular mass of 
=160
n= 
Molecular formula 
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