What is the volume of 2.1 moles of chlorine gas (cl2) at standard temperature and pressure (stp)?

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.)

Why do lunar and solar eclipse not happen every month

In a ball-and-stick molecular model, what do the sticks represent?