Identify the following as a compound or a mixture: quartz (sio2)

How much energy is made when a pice of wood burns. how do you know

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 correct term for living the most sustainable life you can within your current circumstances?