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?

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?

In which phase of mitosis do the spindle fibers pull the chromosomes apart to opposite sides of the cell ?