Chemistry

Every moment of every day, chemistry plays a part in all we experience. This branch of the Helium network humbly attempts to illuminate the vast array of chemical knowledge, making it accessible to all. Let our site inform, inspire, and awe you with chemical wonders.
Exploring the ozone layer
By: Alex Thompson - 495703
The abundance of ozone in a column of air having a diameter of one centimeter varies seasonally and with latitude. In the equatorial region of the Earth, the ozone content of the atmosphere is about 250 Dobson units (DU), where:1 DU = 2.69 x...
Properties of cases: Kinetic molecular theory
By: Lime Red Tetrahedron
Properties of Gases - Kinetic Molecular TheoryThe kinetic molecular theory is the cornerstone upon which the ideal gas laws are founded. The kinetic molecular theory is a theory that aims to explain the phenomena of gases at standard temperatures and pressures.The TheoryFirst of all...
By: Douglas Roger Sandy Dympnus Christopher Messer
What is the difference between bichloracetic acid and dichloroacetic acid? The short answer is that there isn't any difference. These are two different names for the same substance.To explain the above statement a little, you would first note that neither of these is the...
By: Virginia Gaces
Performing laboratory experiments in Clinical Chemistry are methods of enhancing the understanding and retention of the principles and theories learned in the lecture portion. It is an integral part of the course. The laboratory experiments however, should be prepared properly to be able to contribute...
Chemistry: How a breathalyzer test works
By: Lime Red Tetrahedron
When a breathalyzer test is administered, the subject breaths into the device, where any ethanol in the breath becomes involved in a redox reaction with acidified potassium dichromate(VI) K2Cr2O7. Any alcohol is oxidized into ethanoic acid. Orange Cr(VI) is reduced to green Cr(III).Cr2O7-2 +...
By: Virginia Gaces
Clinical Chemistry is one major section of the laboratory where substances in blood are tested and made use of as a tool in diagnosing diseases. Substance tested include various blood constituents, the most common of which are: glucose, creatinine, blood urea nitrogen, proteins, electrolytes, the...
The elementary particles
By: Harry Stevens
The elementary particles are the particles that make up everything that we know and understand about our world and our universe. The majority of the particles that we know of are described by a wonderful masterpiece called the Standard Model. This model describes all of...
By: Ernest Capraro
Chlorine is one of the more noxious elements. A greenish gas at room temperature, elemental chlorine is diatomic - which is to say two chlorine atoms are bound together by a single bond. Like all halogens (elements from Group 7 on the periodic table), chlorine...
An overview about the chemical element Hafnium
By: Mayflor Markusic
Two dozen years before halfnium was discovered and identified, its existence was already predicted by Dmitri Mendeleev. The same Russian scientist also predicted that this element will have properties that are similar to another metallic element, the zirconium. In the early 1900s, Niels Bohr, a...
By: Mayflor Markusic
Gold jewelry was buried along with the mummified bodies of Egyptian pharaohs. Johnny Depp had to wear gold caps on his teeth for his role in the Pirates of the Caribbean. From tombs to teeth, gold can be found. People would sell gold, hoard gold...

 

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