When [OH -] changes from 10-9 to 10- 11 in a solution: Kw = [H-][OH-]
what is the [H-] after the change?

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 many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy