Cu ajutorul substanţelor indicate alcătuiţi cele 4 tipuri de reacţii chimice studiate. Egalaţi ecuaţiile: H2, Cl2, Mg, HCl, Al2O3, Fe(OH)3, KOH, CaCO3, CaO, CO2, O2 DAU COROANA

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.