Is the metal clip on the seatbelt in the summertime have a higher specfic heat or does the fabric on the seat belt?

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?

Classify this reaction: 2al+n2-> aln.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.