The density of sio2 is 2.27 g cm-3. given that its structure is amorphous, calculate the number of molecules per unit volume, in nm-3. compare your result with (a) and comment on what happens when the surface of an si crystal oxidizes. the atomic masses of si and o are 28.09 and 16,respectively

Explanation:

Oxidation is defined as the reaction of oxygen and a substrate which could be a metal, non-metal etc. Pure Silicon can be found to be too reactive and hence forms alloys with non-metals.

Therefore, oxidation of silicon will form a layer of silicon dioxide on the surface of the silicon and hence, the crystal Silicon structure is partly lost with the formation of an amorphous SiO2. An example of a feasible oxidation of silicon is thermal oxidation which follows the equation:

Si + 2H2O -> SiO2 + 2H2

Si + O2 -> SiO2

1 a

2 d

3 a

4 c

explanation: