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magia

this is an old aieee question if im not mistaken, th formula for formal charge is:

well this question i am a bit uncertain, in the structure of phosphate is, one oxygen has a double bond and 3 oxygen have single bond.

Now formal charge is
old group number minus electrons on atom (the roman numeral from the older system of group numbering, NOT the IUPAC 1-18 system)

so for double bonded oxygen it is: 6 - 6 = 0
and for each single bonded oxygen it is: 6-5 = 1

So total formal charge on oxygen is 3
Therefore net formal charge on each oxyge is 3/4 = 0.75

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