Q3 of 37 Page 22

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

Given:

Percentage of Iron in the oxide = 69.9%


Percentage of oxygen in the oxide = 30.1%


To determine the empirical formula of iron oxide, we need to find the simplest whole number ratio.



Therefore, the empirical formula for iron oxide is Fe2O3.


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