First, you would add the products: 0.4 + 6.01 = 6.41 g Then, to get the mass of Iron required, you would do 6.41 - 5.0 = 1.41 This is because in the conservation of mass principle it states, mass of reactants = mass of products.
Believe it or not our the light we see "visible light" is an example of electromagnetic wave. other examples include microwaves, radio waves, infrared, ultraviolet, x-rays, and gamma rays.
