Question

Determine the molecular formula of oxide which has 69.9% of Fe & 30.1% of o2 by Mass​

Answer 1

Explanation:

Form the available data Percentage of iron = 69.9

Percentage of oxygen= 30.1 Total percentage of iron & oxygen= 69.9+30.1= 100%

Step 1 calculation of simplest whole number ratios of the elements

Element

Percentage

Atomic mass

Atomic ratio

Simplest ratio

Simplest whole no ratio

Fe

69.9

55.84

69.9/55.84=1.25

1.25= 1

2

O

30.1

16

30.1/16 = 1.88

1.88=1.5

3

Step 2 writing the empirical formula of the compound

The empirical formula of the compound = Fe2 O3