In the Material Science laboratory at Stevens, a new steel alloy was developed having a thermal neutron absorption macroscopic cross section of 0.2052 cm- and scattering macroscopic cross section of 0.9565 cm-!. The density of the alloy, made from iron and carbon, is 7.64 g/cm3. With the properties of the component elements shown below, calculate the percent composition by weight of the iron and carbon in the alloy. > Element Iron Carbon Gram Atomic Weight 55.845 12.011 Oa (barns) 2.56 0.0035 Os (barns) 11.22 5.55