n sulfur + H2 => (n-1) sulfur + hydrogen sulfide + H(+)
n sulfur + h2 => (n-1) sulfur + hydrogen sulfide + h(+)
n sulfur + H2 => (n-1) sulfur + hydrogen sulfide + H(+)
n sulfur + h2 => (n-1) sulfur + hydrogen sulfide + h(+)