The two factors which affect the density of a substance *
Answers
Answer:
The density of an object or quantity of matter is its mass divided by its volume. This is usually measured under standard conditions for temperature and pressure: 0°C and 1 atmosphere of pressure.
One factor affecting the density of a material is how concentrated the atoms are in a given volume. In some cases, materials made of atoms with a lower atomic weight have a greater density than those with a higher atomic weight, due to the atoms being more tightly packed. This is especially true for solids.
The atoms in some materials—especially solids—are closely packed compared to those of other materials. Thus, it is possible for a material made of atoms of a lower atomic number to be heavier than that of a high atomic number for a given volume.
A good example is the comparison of the elements Tin and Manganese. Tin has the atomic number of 50 and the atomic weight of 118.7 μ (atomic mass unit or Dalton), while Manganese is number 25 with an atomic weight of 54.9 μ. However, Tin has a lower density at 7.31 g/cm3, while the density of Manganese is 7.43 g/cm3. In other words, even though the mass of Manganese atoms are one-half that of Tin, its density is higher than Tin.
Change in volume
The volume of a material can change with temperature and pressure. This, in turn, changes the density of the material.
As the temperature increases, most materials expand or increase their volume. This results in a decrease in density. Likewise, when the temperature goes down, the density usually becomes greater.
When a material changes its phase or state of matter, its volume and thus its density usually changes. Although pressure can influence the change of state of a material, temperature is the main factor.
Answer:
The volume occupied and the mass it contains
Explanation: