How much energy is evolved during the reaction of 48.7 g of al, according to the reaction below? assume that there is excess fe2o3. fe2o3(s) + 2 al(s) → al2o3(s) + 2 fe(s) δh°rxn = - 852 kj

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.