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.
Close as many programs as you can before you start downloading files. Running programs use up system resources, causing file downloads to slow down. Chances are, there are many unused programs on your computer that can be shut down. Shut down any open browser windows or tabs that you aren't using. It's important to do as little as possible on your computer while downloading.