BIOL 1010 Lecture Notes - Hydrophile, Sodium Hydroxide, Molecular Mass

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3 Feb 2014
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It is one of the most abundance substances on earth. Water has a number of emergent properties that make it universally important to life. 1* polar covalent bonds between oxygen and hydrogen result in up to 4 hydrogen bonds between neighboring water molecules. 2* the hydrogen bonds of water are about 0. 05 times as strong as its covalent bonds. Water emergent properties that contribute to the habitability of earth: cohesion of water molecules. Cohesion - the binding together of like molecules. The continuous forming and breaking of hydrogen bonds between water molecules make water a very structured liquid despite the fact that these bonds last only several trillionths of a second. Surface tension - a measure of how difficult it is to stretch or break the surface of a. Adhesion - clinging of one substance to another e. g. , water adheres to cell walls of xylem cells in trees. Covalent: non polar (ex: dihydrogen gas, equal sharing) and polar(ex: water, unequal)

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