A chemical reaction in which one element replaces another element in a compound can be categorized as a combustion reaction.
decomposition reaction.
single displacement reaction.
double displacement reaction

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.)

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

What are the similarities of physical and chemical change ?