Sr(s) + 2 CuNO3(aq) → Sr(NO3)2(aq) + 2 Cu(s) oxidation numbers / what is being oxidized and what is being reduced

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state. a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car