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.
Fix most file download errors. If you try to download a file and it doesnât work, first try to fix the error with these troubleshooting steps: Make sure your Internet connection is working normally. If your Internet connection is unstable, learn how to fix Internet stability issues. Chrome will automatically resume the download.