A sample of an iron oxide weighing 0.982g is found to contain 0.763 g of iron. The rest of the mass is oxygen. What is the % composition of each element?
1 Answer
Jun 21, 2018
Well, we should actually work out the empirical formula of the oxide here...
Explanation:
We gots iron oxide....
Clearly, the percentages must sum to
On these data we could also assess the empirical formula...by finding the molar quantities of each element...
We get
We divide thru by the lowest molar quantity to get a trial empirical formula of....