For which substance does (triangle) hf = 0

a. h2o (l)

b. c (s, diamond)

c. o3 (g)

d. br2 (l)

Why does a red shoe appear red in daylight

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

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?