Question

Density of graphite is:
\[
  A.{\text{ }}0.5g/c{m^3} \\
  B.{\text{ }}2.266g/c{m^3} \\
  C.{\text{ }}1.08g/c{m^3} \\
  D.{\text{ none of the above}} \\
\]

Answer 1

Hint:- Density of a substance is the measure of mass per volume. So, the average density of an object equals its total mass divided by its total volume.

Complete answer:
Now in other words we can say that the objects made of dense material like solids should have more density than the objects made up of liquids and the substances formed by liquid must have more density than the substances from solids.
Now as we know that the graphite is made up of carbon which is a solid substance and is a non-metal and most of the non-metal are solids.
So, graphite must be a denser (should have more density) substance.
And as we know that density is mass per unit volume for any substance.
Unit of mass is gram (g).
And, the unit of volume is \[c{m^3}\].
So, the unit of density must be \[g/c{m^3}\].
And the density of graphite is \[2.266g/c{m^3}\].

Hence, the correct option will be B.

Note:- Whenever we come up with this type of problem then we should remember that any object that is made up of any dense substance like iron, carbon will have less volume than an object from a comparatively made from some less dense substance like water. So, as we know that the formula for density is mass per unit volume. So, less volume and equal mass of dense material makes its density more than other materials.