Help needed ASAP , chemistry

V1t2 = v2t1 is an expression of who’s law

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

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.)