# The mass of liquid propane is 4300g and its volume = 10000mL. What is its density?

Well ${\rho}_{\text{density}}$ is given by the quotient...$\rho = \text{mass"/"volume}$
And so ${\rho}_{\text{propane}} = \frac{4300 \cdot g}{10000 \cdot m L} = 0.43 \cdot g \cdot m {L}^{-} 1$...
Note that when you fill an LPG cylinder ($\text{LPG=liquefied petroleum gas=propane}$) say for a barbecue, when you lift the filled cylinder you do notice the difference in mass between the empty and the filled cylinder.