the enthalpy of combustion of ethane hydrogen and methane are -337.23,58.55and -372.8 kc/mole respectively .calculate the enthalpy of hydrogenation of ethene​

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?

What role does weathering have in shaping earth’s surface? a) it allows sediments to fall out of a medium. b) it sediments settle on a new surface. c) it breaks down older material into sediments. d) it transports sediments to a different location. will give brainliest, answer quickly.

Which characteristics affect ocean water’s temperature? check all that apply. depth location mass salinity waves