Acompound is found to consist of 1.37g of iron and 2.62g of chlorine. what is the percent by mass of chlorine in the compound?

Which substances have the lowest melting points: ionic covalent, or metallic

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?

Areaction in which products can react to re-form reactants is