When heated, hydrogen sulfide gas decomposes according to the equation: ___ H₂S → ___ H₂ + ___ S.

A 3.40 g sample of H₂S...
a) 1 H₂S → 1 H₂ + 1 S
b) 2 H₂S → 2 H₂ + 1 S₂
c) 2 H₂S → 2 H₂ + 1 S
d) 1 H₂S → 2 H₂ + 1 S