What is the composition, in atom percent, of an alloy that contains a) 45.5 lbm of silver, b) 84.7 lbm of gold, and c) 7.3 lbm of Cu

Zinc + lead(ii) nitrate yield zinc nitrate + leadwhat's the chemical equation for this?

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

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?