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Leviafan [203]
3 years ago
13

What is the formula unit for a compound made from Fe3+ and oxygen?

Chemistry
2 answers:
Oxana [17]3 years ago
8 0

Answer : The correct option is, Fe_2O_3

Explanation :

Formula unit of a compound is defined as the minimum number ratio of ions represented in the compound.

The valency of iron is (+3) and the valency of oxygen is (-2). By the criss-cross method the Fe^{+3} cation combine with the O^{2-} anion, it will give Fe_2O_3.

Fe^{+3}+O^{2-}\rightarrow Fe_2O_3

The formula by criss-cross method is shown below.

Alexeev081 [22]3 years ago
6 0
Fe2O3 because O has a -2 charge and Fe and +3, you want the charges to equal each other so if you have 2 Fe with +3 charge the charge becomes 6 if you have 3 O with -2 charge the charge becomes 6.
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