What is H-C-C-C-C-C-C-H?

Answer 1

The chemical that you describe looks like slightly hydrogenated coal. No petroleum derived hydrocarbon would have so few hydrogen atoms. With the addition of another 12 hydrogen atoms, you would have a hexane molecule.

Answer 2

This molecular formula corresponds to hexane, a saturated hydrocarbon with the chemical formula C6H14. Hexane is a colorless liquid commonly used as a solvent in laboratories and industries.