At constant pressure the volume occupied by a definite mass of gas is directly proportional to its absolute temperature.
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Features of the Scanning Tunneling Microscope
The scanning tunneling microscope (STM) invented by Heinrich Rohrer and Gerd Binnig in the 1980s still manages to do a great job today and competes with more advanced microscope types. The scanning tunneling microscope is used for studying the surface atoms that are found on various materials. The...
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What are Compound Microscopes?
Most of the microscopes used today are compound. A compound microscope features two or more lenses. A hollow cylinder called the tube connects the two lenses. The top lens, the one people look through, is called the eyepiece. The bottom lens is known as the objective lens. Below the two lenses is...
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Use of diamonds
Diamond is a crystalline modification of pure carbon formed in the deep interior of the Earth, in the upper mantle at depths of more than 80-100 kilometers, at exceptionally high pressure and temperature. It is the most precious stone, the hardest and most wear-resistant mineral, the most...
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The most expensive metal in the world
Do you think the most expensive metal is gold? No! On earth there are more valuable metals. But we need to divide the value of metals that occur in nature, and metals - isotopes, which are obtained in special laboratories. Let’s look at natural metals first.
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Chemistry of the sky
Chemistry can teach us about the composition of celestial bodies and determine their age.
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Leveling Effect
Effect by which all acids stronger than the acid that is characteristic of the solvent react with solvent to produce that acid, similar statement applies to bases. The strongest acid (base) that can exist in a given solvent is the acid (base) characteristic of the solvent.
van der Waals' Equation
An equation of state that extends the ideal gas law to real gases by inclusion of two empirically determined parameters, which are different for different gases.
Radical
An atom or group of atoms that contains one or more unpaired electrons (usually very reactive species)
Compressed Gas
A gas or mixture of gases having, in a container an absolute pressure exceeding 40 psi at 21.1°C (70°F)
Noble Gases (Rare Gases)
Elements of the periodic Group 0, also called rare gases, formerly called inert gases, He,Ne,Ar, Kr, Xe, Rn.
Calorimeter
A device used to measure the heat transfer between system and surroundings.
Dissociation
In aqueous solution, the process in which a solid ionic compound separates into its ions.
Mass Spectrometer
An instrument that measures the charge-to-mass ratio of charged particles.
Inhibitory Catalyst
An inhibitor, a catalyst that decreases the rate of reaction.
Organic Chemistry
The chemistry of substances that contain carbon-hydrogen bonds.
