what is the final MOLAR amount of gas present in the container if gas is added until the volume has increased to 5.0L?

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.

The size is 8inches if ur a girl

Convection is da answer my dood