Which are factors that affect the rate of chemical reactions? Select all that apply. 1.concentration
2.weight
3.temperature
4.surface area

3. Temperature
4. Surface area
:))

What does that mean you dum bum

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.