A 19.94 gram sample of iron is heated in the presence of excess chlorine. A metal chloride is formed with a mass of 57.91 g. Determine the empirical formula of the metal chloride.

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?

What is the empirical formula for c4h8o2

Which compound contain an iron with a 3+ charge