1.5l of carbon monoxide gas into moles of carbon monoxide gas.

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.

Higher temperature = molecules move around faster. and vice versa.

Answerlimiting reactant;