The gas-phase reaction between H2 and l2 to form HI involves a two-step mechanism: l2 ; 21 H2 21 - 2HI The rate of formation of HI increases with the intensity of visible light. (a) Explain why this fact supports the two-step mechanism given. (Hint: The color of l2 vapor is purple.) (b) Explain why the visible light has no effect on the formation of H atom

Two things that biomedical has invented or innovated

Match the acid base pairs by arranging the acid name with the conjugate base formula. hydrogen carbonate hydrogen phosphate carbonic acid read water sulfuric acid phosphoric acid a. co32- b. hso4- c. hco3- d. po43- e. h2po4- f. oh-

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?