10HI + 2KMnO4 + 3H2SO4 -> 5I2 + 2MnO4 + K2SO4 + 8H2O According to the balanced equation above, how many miles of HI would be necessary to produce 2.5 mol of I2, starting with 4.0 mil of KMnO4 and 3.0 mol og H2SO4?

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.