What impact do you think GPA and Extracurriculars might have on the college you attend?

At room temperature what happens to the average kinetic energy of the molecules of a solid, liquid, and a gas

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.)

How are isotopes of the same chemical element alike? how are they different?