A reaction in which one element replaces another in a compound or in which two elements in different compounds trade places is called a(n) reaction

Aspirin has a density of 1.40 g/cm3 what is the volume in cubic centimeters of a tablet weighing 320 mg ?

What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .

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?