Show a numerical setup for calculating the mass in grams of a 4.2-mole sample of O2. Use 32 g/mol as the gram-formula mass of O2

Ithink it’s 3 as the answer.

The gas would begin to expand, and eventually the can would burst or explode.

The chemical bubbles

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.