How can i convert percent concentration to molarity?

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.)

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

How is the atomic number of a nucleus changed by alpha decay