If the following elements were to combine with each other, choose which demonstrate the law of multiple proportion. select all that apply. z: x = 7: 1 a: z = 2.5: 1 a: z = 2.2: 1 y: x = 11: 1

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 is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-

Is it safe to take 450mg of diphenhydramine hydrochloride?