A gas sample has a mass of $4.8\,\mu\text{g}$ and takes up a volume of $1.2\,\text{dm}^3$. What is the density of the gas sample?
- A$4.0 \times 10^{-3}\ \text{kg m}^{-3}$
- B$4.0 \times 10^{-5}\ \text{kg m}^{-3}$
- C$4.0 \times 10^{-6}\ \text{kg m}^{-3}$
- D$4.0 \times 10^{-8}\ \text{kg m}^{-3}$