What is the percent composition of Mg in the compound Mg3(PO4)2? Question 8 options:

A. 23.57%
B. 21.92%
C. 27.74%
D. 32.32%

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?

Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false