Chemical Basis of Life
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A series of free High School Chemistry Video Lessons.
Organic Compounds
Organic compounds are compounds composed of carbon, hydrogen and often oxygen or nitrogen. Organic compounds are named so because they are associated with living organisms. Several important types of organic compounds include carbohydrates, lipids, nucleic acids and proteins
An introduction to organic compounds of life.
A hydrogen bond is an extremely strong bond between molecules with a Hydrogen atom bonded to a Fluorine, Oxygen or Nitrogen atom and a molecule with a Fluorine, Oxygen or Nitrogen atom. Hydrogen bonds are notably found between the bases in DNA.
The definition and importance of hydrogen bonds.
Try out our new and fun Fraction Concoction Game.
Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.
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