Question

цепочка превращений

Answer 1

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