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.
I explain how to fix a weird glitch in iTunes that prevents you from loading music onto your device. This is a simple fix to the grey dotted circle problem in iTunes.1  Howto & Style.2  Standard YouTube License. explain how to fix a weird glitch in iTunes that prevents you from loading music onto your device. This is a simple fix to the grey dotted circle problem in iTunes. 1  Howto & Style. 2  Standard YouTube License.