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Hello.
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So in this question we are given a molecule that is cs3o negative and we need to find out the formal charge here.
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So the formal charge of this molecule.
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So now let us first draw the lewis dot structure of this molecule.
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One carbon atom is there.
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Three hydrogen atoms are there.
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One oxygen is there which is having the lone pair of electron and it will contain one negative charge also.
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And if we need to, this is the lewis structure and the dot lewis dot structure will be h, the bond between the carbon and hydrogen.
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These two electrons are here, two electrons are there and two electrons to this oxygen and it will contain loan pair and negative charge.
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Now we know that formal charge is equal to valence electron minus non -bonding electron minus total bonded electron divided by 2.
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So now using this formula first let us see the carbon atom.
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So the valence electron of this carbon atom it is it is for minus non -mine bonded electron, it is 0 minus total bonded electrons as you can see 1, 2, 3, 4, 5, 6, 7, 8 so 8 are there divided by 2.
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So on solving this we will have the 0 formal charge.
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Now for the hydrogen atom...