To answer this question, you need to know the valence of sulfur(S) and oxygen(O) atom. Both sulfur and oxygen have 6 valences electron. In the molecule, there are 1 sulfur and 4 oxygen, then the calculation should be: sulfur :1 *6= 6 oxygen:4 *6= 24 charge(-2)= 2 total= 6+24+2=32
