How many particles are there in 82 grams

Chemical kinetics what was the rate of reaction in trial 3? choose the closest answer.

What is the value of keq for the reaction expressed in scientific notation?

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?