alex oulton
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No, a negative plus a negative is a negative
A negative plus a negative equals a negative.
A negative plus a negative still gives a negative answer.
The compound FeF3 is a salt, meaning that it has a covalent bond. Split the anion and the cation apart to determine the charge. Since iron can be either +2 or +3, you have to look at the anion (F- in this case) and look at how many negative charges are there. If there are three F-, that means there are three negative charges. That should tell you which iron is involved in the bond.
The total sum is -12 or negative twelve.