You need to prepare an 820. ml of a 1.500M solution of sulfuric acid (H2SO4). If the stock bottle has a molarity of 18.0M, how much of the stock solution is required?

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.)

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

What happens to isotopes that are unstable?