Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)ag(s) + h2s(g) → ag2s(s) + h2(g)

Balanced the tarnishing equation:

2Ag(s) + 1H₂S(g) → 1Ag₂S(s) + 1H₂(g).

According to principle of mass conservation, number of atoms must be equal on both side of balanced chemical reaction.

There are two silver atoms, two hydrogen atoms and one sulfur atom on both side of balanced chemical reaction.

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.