Characteristics that identify a sample of matter as a substance are simply whether it is matter or not. However, which substance the matter is can be identified through its density, melting point, conductivity, etc...
Every sample of a given substance has the same properties because a substance has a fixed, uniform composition.
A sample of matter is considered a pure substance when the molecular structure is totally homogeneous. It is a pure substance when this material contain only one type of molecules.
No, as density also depends on the state of matter in the sample of the substance.
a pure substance! ;)
Homogeneous substance :D
A pure substance is a sample of matter that has definite physical as well as chemical properties. A pure substance can be either a single compound, or a single element.
The particles, those atoms/molecules of matter in a sample, will increase in kinetic energy as the sample is heated. Their kinetic energy will appear as vibrational energy, and the amount of vibrational energy of the atoms or molecules of a substance is directly proportional to the temperature of that substance.
matter is a general term for the substance that makes up all observable physical objects.
Any sample of the same substance has the same density,no matter how large or small the sample is.
The volume and the mass of sample both depend on the size of the sample.A small sample has small volume and small mass, a big sample has big volumeand big mass. But the ratio of mass to volume is constant for a pure sample ofa substance, no matter what size the sample is. That ratio is called the densityof the substance.
All intrinsic properties will be the same regardless of sample size. Some examples would be density, color, temperature, chemical reactivity, etc.
Carbon dioxides is a sample of a substance that sublimes.
This is a good working description of the gaseous phase of matter. A sample of gas will assume the shape and volume of its container, so the sample has no shape or volume of its own.
It is the behaviour exhibited by matter in various chemical, physical or biological reactions or treatments.
CO2(aq) because a solution means the substance is dissolved in water.
Mass is the amount of matter in a sample of a substance. Mass translates directly to how much matter is in something, in other words, how many atoms are crammed into it.
I regard this as a trick question, because it is not really true or false, it depends upon the specific substance which we are sampling. A very homogeneous substance, such as for example distilled water, is always going to have the same density in every sample, but a somewhat heterogeneous substance such as concrete, is not going to have exactly the same density with every sample.
a pure substance. :)