How do we balance equations ? give an example.

What is the mass of 4 molecules of co2

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?

When a scientific theory has been tested and proved by the scientific community, it becomes a law