PLEASE HELP ME PLEASE

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

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?

The most common form of matter in the universe