Callahan County, TX Real Estate & Homes for Sale Homes for Sale in Callahan County, TX have a median listing price of $128,995 and a price per square foot of $75. There are 103 active homes for sale in Callahan County, Texas, which spend an average of 73 days on the market. Some of the hottest neighborhoods near Callahan County, TX are Tanglewood East, Chimney Rock Area, Far Southside, River Oaks-Brookhollow. You may also be interested in homes for sale in popular zip codes like 79602, 79601, or in neighboring cities, such as Abilene, Clyde, Baird, Cisco, Coleman.
hydrogen bond. A chemical bond in which a hydrogen atom that is already bonded to an atom in a molecule forms a second bond with another atom, either in the same molecule or in a different one. The second atom is usually of a type that strongly attracts electrons, such as nitrogen or oxygen.
Hydrogen bonds are primarily formed between molecules as an electrostatic attractions. Hydrogen bonding is the key to water's unique properties as a universal medium. Hydrogen bonds can also form between parts of the same molecule, giving it increase stability. The shape of DNA and large proteins, for example, is maintained by hydrogen bonds within the molecule. general equation for synthesis