Balance the following equations: (a) Ag(s)+H2S(g)+O2(g)⟶Ag2S(s)+H2O(l)

Heat is involved in chemical change in two ways; chemical changes either result in heat being added to or removed from an object, and chemical changes require a certain amount of heat before they can take place.

Ithink the answer is c

Ithink the answer is b.

Ansa leaf changing color in autumn;