How many kilograms of kerosene is in a five-liter bottle?

A five-liter bottle is 5 liters, i.e. volume.
To find the mass of kerosene, we need its density and volume. The second is in the problem statement, and the density is in the table:
The density of kerosene is 800 kg per cubic meter.
Density is mass divided by volume, therefore, to find mass, you need to multiply volume by density.
But the volume is measured in SI in cubic meters, we translate:
5 liters = 0.005 cubic meters
Then:
0.005 * 800 = 4 kg – the mass of kerosene.
Answer: m = 4 kg