A compound with EF CH2O was found to have a molar mass between 89 and 91 g. What is the MF of the compound?

In this synthesis reaction what products will form

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

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?