The density of the rare metal osmium is 22600 kg / m3, which means.

If we know the density of a substance, then this allows us, without resorting to weighing, to estimate its mass. It is enough to multiply the density by the volume that this substance occupies. The formula for calculating mass is simple:
m = rV, where m is mass, r is density, V is volume.
In our case, r = 22 600 kg / m³. Deciphering the dimension kg / m³: If we had at our disposal a cube of osmium, the edge of which is 1 m (volume 1 m³), then its mass would be 22 600 kg. For comparison, the same volume of water would have a mass 22.6 times less, because its density is 1000 kg / m³.