Try it Yourself Â». In the example above, the background image is shown in the same place as the text. We want to change the position of the image, so that it does not disturb the text too much. The position of the image is specified by the background-position property:
Given enough time and an average energy less than 100^@C, all the molecules in liquid water will become gas, and evaporate. Condensation is the return of molecules from the gaseous state to the surface of the liquid. For example, an individual water molecule will remain in suspension in the atmosphere. When enough water molecules join together, the molecules will form a rain drop or snow crystal and fall to the earth.
In a condensation reaction, two molecules or parts thereof combine, releasing a small molecule. When this small molecule is water, it is known as a dehydration reaction. Other possible lost molecules include hydrogen chloride, methanol, and acetic acid. When two separate molecules react, their condensation is termed intermolecular. A simple example is the condensation of two amino acids to form a peptide. This reaction example is the reverse of hydrolysis, which splits a chemical entity into two parts through action from the polar water molecule, which itself splits into hydroxide and hydrogen ions.