Question

Formal charge of atom in S in HSo4

Answer 1

Hydrogen Sulphate ---HSO4

To calculate formal charge of atom S in HSO4:

1.The total overall charge of HSO4 is= -1

2. Charge of Hydrogen = +1

3. Charge of Oxygen = -2

4. Let x be the charge of S atom.

Total charge :

+1+X+4(-2)=-1
+1-8+x=-1
x-7=-1
x=6
Therefore charge on S is +6

Answer 2

as we have to find the formal charge of S in HSO4 let first identify the others element charge  but first assume the charge on S is "x".
As we know that the charge of H is equal to +1  and the charge on Oxygen is equal to the -2 
Hence also, the overall charge on HSO4 is equal to the -1 .
so By simple calculation of adding up charge 
+1+X+4(-2) = -1    as the oxygen atoms are   4 that why we multiply charge of oxygen with 4 here.
so , +1+X-8= -1
X - 7 = -1 And then X will be equal to 6 which means charge on sulphur is 6