What crystals are formed when a molten ceramic cools slowly

What is the relation between concentration of reactants and the rate of chemical reaction?

What is the overall order of reaction for rate = k[no]2[o2]

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?