If 37.5 mL of methanol is dissolved in water to make 456mL of dilution, what is the concentration expressed in volume/volume% of the solution?

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.

Thermohaline circulation and gyres