How many moles of iron react with how many moles of sulfuric acid in the following equation: 2 Fe + 3 H2SO4 → Fe2(SO4)3 + 3 H2

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 lowest number energy level where a d sublevel is found

Which substance is a steroid? cholesterol fatty acid monosaccharide trans fat