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.
By: Ernest Capraro
Historically, most of the chemicals that were dealt with were inorganic compounds, and could be identified based on simple physical and chemical properties. Density, color, crystalline structure, physical state, melting and boiling points, reactivity with other known compounds - these were the tools that allowed...
By: Ernest Capraro
A polyatomic ion is two or more atoms that are covalently bonded to one another and possess a charge. (The charge differentiates them from covalent compounds, which are neutral.) While the definition is nice to have, it doesn't help much when you're confronted...
By: Ernest Capraro
When we talk about ionic compounds (the ones that make nice, regular crystal structures), we teach that they are formed from the electrostatic attraction between oppositely charged ions. This is true. It is also true that the ions align themselves very nicely to create crystalline...
By: Ernest Capraro
For the quick answer, here are the two formulas so you can go and do it. C = (F - 32)*5/9 F = (C*9/5) + 32 F = degrees FahrenheitC = degrees Celsius* = multiply/ = divide() = do this first If you wanted to...
The chemistry of gunpowder
By: Ernest Capraro
Gunpowder is a simple mixture that supports rapid combustion. Its composition has slightly varied over the centuries, and can in fact be made using different proportions of the ingredients. The different blends affect the speed and how completely the mixture burns. The traditional ingredients for...
By: Ernest Capraro
Baking soda is scientifically known as "sodium bicarbonate" or, if you lived a century or more ago - bicarbonate of soda.The chemical formula for baking soda is NaHCO3, where Na is the sodium ion, and HCO3 is the bicarbonate ion. CO3 is also known...
By: Ernest Capraro
When faced with a redox reaction, sadly, you can't rely on the atoms and molecules alone to guide you in balancing. There will often be multiple solutions that appear to be right, yet don't reflect chemical reality. To make sure that you get the...
By: Ernest Capraro
Oxidation numbers do not have a true physical significance in the real world, but they are tremendously useful as a book-keeping method when estimating oxidation states. In practice, students utilize oxidation numbers most frequently when balancing redox reactions (see the article "How to Balance...
By: Benjamin Patri
It's one of the most exciting things that could ever happen. Getting Water to Burn! With this, we can see big potential in the future use of water. I don't know about you, but there is a movie called "Chain Reaction" that shows a group...
By: Ernest Capraro
Concentration is calculated in numerous ways. Usually one is best suited to the work at hand. You can convert between different measures of concentration quite freely, though a bit of math will be involved.Molarity (M)is very commonly used in the classroom, and in many...

 

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