Question

S-SO2-SO3-H2SO4-MgSO4

Answer 1

S+O2=SO2

2SO2+O2=2SO3

SO3+H2O=H2SO4

H2SO4+Mg=MgSO4+H2

Answer 2

1) S+O₂ = SO₂

2)2SO₂+O₂ = 2SO₃

3)SO₃+H₂O = H₂SO₄

4)H₂SO₄+Mg = MgSO₄ + H₂