The answer to the question "How Many Kilograms in One Litre?" is very ambiguous and depends on many parameters which should be analyzed. For example, it is the substance nature, temperature, amount of emptiness, etc.
The size which shows the number of kilograms in substance liter is called density.
Types of density
There is average density of a body, substance density, body density in a point. The average density of a body is the relation of body weight to its volume. Density of substance is the relation of mass of substance to its volume. Body density in a point is the relation of body weight to volume which tends to zero.
Still there is a true and seeming density. True density is the density determined without emptiness, and seeming – taking into account emptiness.
Dependence of density on temperature
It is established that substance density at increase of temperature decreases. It is connected with increase in porosity. However in the nature a number of substances which density deviates the general dependence meets. So, at water the maximum density of 1 kg/l, it is reached at a temperature of 4 wasps. At fall of temperature its density decreases, reaching 0.93 kg/l (lower than 0th OS). That is why ice floats on water.
Upon transition from one aggregate state to another density changes in steps.
Density which can be met in the nature
1. The average density of Earth – 5.5 kg/l.2. Density of river water – 1 kg/l.3. Granite density – 2.6 kg/l.4. Density of solar substance – 1.5 kg/l.5. The biggest density in the world belongs to metal to osmium – 23 kg/l. 6. Iron density – 7.9 kg/l.7. Density of an atomic nucleus – 2*1014 kg/l.8. Air density – 1.29 kg/l.9. Density of carbon dioxide – 1.98 kg/l.10. Density of sea water – 1.03 kg/l.11. Milk density – 1.04 kg/l.12. Oil density – 0.81-0.85 kg/l.13. The average density of wood – 0.7 kg/l.14. Alcohol density – 0.8 kg/l.15. Mercury density – 13.6 kg/l. More detailed information can be found from any reference book of physical and chemical sizes.
What measure density by?
The densimeter – a vessel for measurement of true density of substances in all aggregate states. The areometer – the soldered glass vessel for measurement of density of liquids. The principle of action is based on Archimedes's law. Kachinsky's drill – the highly specialized device for determination of density of soils. The principle of action is based on very exact selection of the set soil volume.