Why do all objects made of the same material have the same density?

Why do all objects made of the same material have the same density?

Unlike the mass and volume that may be different for each specimen, all objects made of the same material will have the same density. Because of this the density is often used to identify unknown substances or to determine the percent composition. The densities of various substances are given in Table 1.

Why are densities the same?

The mass of atoms, their size, and how they are arranged determine the density of a substance. Density equals the mass of the substance divided by its volume; D = m/v. Objects with the same volume but different mass have different densities.

Why some materials are denser than others?

Different atoms have different masses and different substances are made up of different atoms. Volume – some substances have particles spaced further apart than others. E.g. particles in solids are more closely packed than in liquids or gases. These are the two main determinants in the density of a substance.

Why do objects have different densities?

All types of matter—solids as well as liquids—are made up of many different atoms. Depending on the mass of these atoms, their size and the way they are arranged, different substances will have different densities.

Will the density of a material always be the same?

Explanation: Density is an intensive property. This means that regardless of the object’s shape, size, or quantity, the density of that substance will always be the same. It is because density in an intensive property of matter.

Do the same materials have the same mass?

So if we say two objects have the same mess then can we say that they have the same volume, that they are made of the same material that they have the same amount of matter or that they have the same density. So hence having the same mass doesn’t mean having the same volume.

Is density always the same?

The density of a substance is the same regardless of the size of the sample.

Why is density used to identify a material?

Density can be useful in identifying substances. It is also a convenient property because it provides a link (or conversion factor) between the mass and the volume of a substance. Mass and volume are extensive (or extrinsic) properties of matter – they depend on amount.

How do you compare density?

If you compare the weight of two objects of the same size and shape (the same volume), the one that weighs more is more dense. So, if you weigh a piece of clay and a piece of wood that are the same size and shape, the clay weighs more than the wood, so the clay is more dense than the wood.

Do all substances have the same density?

So Pure materials ,they can not have same densities. (Assuming they are not isotopes of each other.) But mixtures, compounds or different phases can have same densities.

Why are different materials different?

Properties like shape and mass may be different for different objects, even when they are made of the same material. Density is a useful property for making comparisons between different materials. Other properties of materials can include their viscosity and conductivity.

What factors cause differences in density?

A density difference can exist between two fluids because of a difference in temperature, salinity, or concentration of suspended sediment. Density currents in nature are exemplified by those currents that flow along the bottom of oceans or lakes.

How is the density of a material determined?

Density also depends on the material. A piece of iron with the same dimensions as a piece of aluminium will be heavier because the atoms are more closely packed. Scientists can measure how tightly packed the particles are by measuring the mass of a certain volume of the material, for example, one cubic centimetre.

What are the different densities of common substances?

Densities of Common Substances Material Density (g/cm 3) State of Matter copper 8.3-9.0 solid lead 11.3 solid mercury 13.6 liquid uranium 18.7 solid

Why do gases with the same mass have different densities?

The same mass takes up a bigger volume – this means the gas is less dense. Density also depends on the material. A piece of iron with the same dimensions as a piece of aluminium will be heavier because the atoms are more closely packed.

What are the most dense materials in the world?

Material Density (g/cm 3) State of Matter lead 11.3 solid mercury 13.6 liquid uranium 18.7 solid gold 19.3 solid