A small helium balloon with a volume of 178.6 mL at a pressure of 730 mmHg gets loose and
rises. As it does it expands to 413.0 mL. What is the final pressure on the balloon?
(Answer to the nearest 1 mmHg, but do not include units)

What is the equilibrium constant of aa+bb=cc+dd

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 substance has a mass of 9.5g and volume of 2.1cm^3