Question

цепочка превращений

Answer 1

$S + H_{2} = H_{2}S \\2H_{2}S + 3O_{2} = 2SO_{2} + 2H_{2}O\\2SO_{2} + O_{2}  = 2SO_{3}\\2SO_{3} + H_{2}O = H_{2}SO_{4}\\H_{2}SO_{4}+Ba(OH)_{2} = BaSO_{4}+2H_{2}O$