The diagrams illustrate an empty container and the same container after it has been filled with liquid. The mass of the empty container is $120\,\text{g}$. After the liquid has been added, the combined mass of the container and the liquid becomes $600\,\text{g}$. The volume of the liquid in the container is $600\,\text{cm}^3$. Calculate the density of the liquid.
- A$0.020\,\text{g cm}^{-3}$
- B$0.80\,\text{g cm}^{-3}$
- C$1.0\,\text{g cm}^{-3}$
- D$1.2\,\text{g cm}^{-3}$