The answer is e.trends in melting points. The conductivity, shininess, malleability and ductility are associated to the electron-sea model. The characteristics of metallic bonds basically describe many of the physical properties of metals by using the formation of the so called sea of electrons that are free to move around.
1. To make steel
2. It's salts are used to treat anaemia.
3. Pure iron is used in magnets.
4. It is used as a catalyst in the Haber Process which makes ammonia.
5. A very pure iron called wrought iron is used for ornamental gates or fences.
Mol = M(molar concentration) times V (volume)
0.625 L times 3 mol/L = 1.875 mol
