Basics of Hydrocarbon Chemistry. Crude oil is a mixture of hydrocarbon molecules, which are organic compounds of carbon and hydrogen atoms that may include from one to 60 carbon atoms. The properties of hydrocarbons depend on the number and arrangement of the carbon and hydrogen atoms in the molecules.
Why does my download stop before it is finished? When a user experiences an issue while downloading files, it is usually a problem with the connection to their Internet service.
6. Problem: During normal, everyday use, Windows places fragments of files you create and delete throughout your hard drive â instead of in just one location. This can cause your computer to slow down. Solution: You can speed up your slow computer by defragmenting the hard drive.