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.
If it's on a mac, hit the eject symbol to the right of your iPod listing in iTunes, then physically disconnect it after it's gone from iTunes. This allows the software to close out the iPod before disconnection. Just yanking it loose can cause data corruption.