Phosphorus in and example of a(n)

a. compound
b. mixture
C. element
d. solution

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

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?

Hey guys so i need to know what is _nh3+> nh4oh ~chemistry~