How do I classify mixtures as solutions or non solutions based on their appearance?

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .

What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist