pure substance - translation to italian
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pure substance - translation to italian

MATTER OF CONSTANT COMPOSITION BEST CHARACTERIZED BY THE ENTITIES (MOLECULES, FORMULA UNITS, ATOMS) IT IS COMPOSED OF AND CHARACTERIZED BY PHYSICAL PROPERTIES LIKE DENSITY
Chemicals; Chemical; Chemical sources; Pure substance; Chemical substances; Artificial material
  • Chemicals in graduated cylinders and beaker.
  • center
  • Colors of a single chemical ([[Nile red]]) in different solvents, under visible and UV light, showing how the chemical interacts dynamically with its solvent environment.
  • [[Potassium ferricyanide]] is a compound of potassium, iron, carbon and nitrogen; although it contains cyanide anions, it does not release them and is nontoxic.
  • Native sulfur crystals. Sulfur occurs naturally as elemental sulfur, in [[sulfide]] and [[sulfate]] minerals and in [[hydrogen sulfide]].
  • Cranberry glass, while appearing homogeneous, is a ''mixture'' consisting of glass and [[gold]] colloidal particles of about 40{{nbsp}}nm in diameter, giving it a red color.

pure substance         
sostanza pura
chemical substances         
sostanze chimiche
pure oil         
  • station in Monroe, Wisconsin]], built in 1935.
  • Postcard showing a Pure Oil station and a lunch counter, ca. 1930-1945.
U.S. BRAND OF FUEL RETAILERS OWNED BY PURE OIL JOBBERS COOPERATIVE, INC.
Pure Oil Company; Ohio Cities Gas Company
olio puro

Definition

chemical
(chemicals)
Frequency: The word is one of the 1500 most common words in English.
1.
Chemical means involving or resulting from a reaction between two or more substances, or relating to the substances that something consists of.
...chemical reactions that cause ozone destruction.
...the chemical composition of the ocean.
...chemical weapons.
ADJ: ADJ n
chemically
...chemically treated foods...
The medicine chemically affects your physiology.
ADV: ADV with v, ADV adj
2.
Chemicals are substances that are used in a chemical process or made by a chemical process.
The whole food chain is affected by the over-use of chemicals in agriculture.
...the chemical industry.
N-COUNT: usu pl

Wikipedia

Chemical substance

A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be simple substances (substances consisting of a single chemical element), chemical compounds, or alloys.

Chemical substances are often called 'pure' to set them apart from mixtures. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. Other chemical substances commonly encountered in pure form are diamond (carbon), gold, table salt (sodium chloride) and refined sugar (sucrose). However, in practice, no substance is entirely pure, and chemical purity is specified according to the intended use of the chemical.

Chemical substances exist as solids, liquids, gases, or plasma, and may change between these phases of matter with changes in temperature or pressure and time. Chemical substances may be combined or converted to others by means of chemical reactions.