A pure substance is any single type of material that has not been contaminated by another substance. Water is considered a pure substance if the water contains only hydrogen and oxygen.
Sugar is a pure substance because its composition is homogeneous throughout. Pure substances can be either elements or compounds. Sugar or sucrose is a compound with the chemical formula C12H22O11.
Milk is not a pure substance; it is considered a mixture because it does not occur naturally on its own. It is a mixture that combines mostly water, sugar, fat and proteins.
In chemistry, the term "property" is frequently used to describe the attributes of a substance, such as density, oxidation, state of matter, mass, conductivity, color, bonding and many other traits. These properties are ...
Increasing the surface area of a substance involved in a chemical reaction exposes more of the material to the reactant, thereby speeding up the reaction process. This is why chemists often use powder, filings and other ...
According to Dictionary.com, matter has three definitions relating to science: the substance that composes physical objects, general corporeal or physical substance and that which occupies space. Matter has other definit...
A phase change in science refers to any substance that changes from one state to another, with possible states being gas, liquid and solid. Substances typically phase change to the closest related state, such as liquid t...