By titration, it is found that 81.1 ml of 0.117 m naoh ( aq ) is needed to neutralize 25.0 ml of hcl ( aq ) . calculate the concentration of the hcl solution.

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.)

Which of these conditions most likely produces an unstable isotope?

The fact that the total amount of energy in a system remains constant is a(n)