Question

Химическая цепочка, срочно помогите
H2S<->S->SO2->SO3->Na2SO4->BaSO4

Answer 1

S + H2 = H2S
S + O2 = SO2
2SO2 + O2 = 2SO3
SO3 + 2NaOH = Na2SO4 + H2O
Na2SO4 + BaCl2 = 2NaCl + BaSO4
$2Na^++SO_4^{2-}+Ba^{2+}+2Cl^-=2Na^++2Cl^-+BaSO_4$
$Ba^{2+}+SO_4^{2-}=BaSO_4$