NCERT Class XI Chemistry Some Basic Concepts of Chemistry Solutions

Question : 3

Total: 36

Determine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% oxygen by mass.

Solution:

Element

Atomic mass

Mole of atom

Mole ratio

Simplest whole no. ratio

69.9

= 1.25

1.25

= 1

30.1

= 1.88

1.88

1.25

= 1.5

Hence, the empirical formula is Fe2O3.

Go to Question:

Prev Question

Next Question