Help! If you were travelling at 45 miles per hour, how long would it take to travel a distance of 340 miles?

Which statement is true about ionic compounds?

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?

Show how to convert the temperature 84.7° c to kelvin. include all steps and label the final answer.