Question

me ajudem aí galera preciso muito pra agora as 19:00h ?

Answer 1

H₂S
2(1)+S=0➞2+S=0➞S=-2

H₂SO₃
2(1)+S+3(-2)=0➞2+S+-6=0➞S=-2+6➞S=+4

Na₂SO₃
2(1)+S+3(-2)=0➞2+S-6=0➞S=-2+6➞S=+4

SO₂
S+2(-1)=0➞S-2=0➞S=+2

Na₂S₂O₄
2(1)+2S+4(-2)=0➞2+2S-8=0➞2S=8-2➞S=6/2➞S=+3