Calculate the equilibrium concentration of nh3 if a sample of solid nh4sh is placed in a closed vessel at 218 ∘c and decomposes until equilibrium is reached.

You can still be friends with each other. you don't have to date since he likes someone else. just stick to being friends for now

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

Ibelieve y y even though i've only taken chemistry for one year