What do you mean ph meaning​

Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

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?

How many moles are contained in 5.6 l of h2 at stp