The relative rates of reaction of ethane, toluene, and ethylbenzene with bromine atoms have been measured.
the most reactive hydrocarbon undergoes hydrogen atom abstraction a million times faster than does the least reactive one.

arrange these hydrocarbons in order of decreasing reactivity.

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?