The unit cell for fe3o4 (feo-fe2o3) has cubic symmetry with a unit cell edge length of 0.839 nm. if the density of this material is 5.24 g/cm3, compute its atomic packing factor. the ionic radii of fe2+, fe3+ and o2- are 0.077 nm, 0.069 nm and 0.140 nm, respectively. in addition, the atomic weights of iron and oxygen are, respectively, 55.85 g/mol and 16.00 g/mol. apf = entry field with correct answer 0.69

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat

What is the oxidation state of an individual bromine atom in nabro3?

What are the trends and exceptions to the trends in electron affinity?