This question is about hydrocarbons.
The table shows some information about alkanes.

Complete the table.
Butane is a saturated hydrocarbon. Explain why butane is called both a hydrocarbon and saturated.
A student has two test tubes. One contains butane and one contains butene.

The student added bromine water to each test tube. Describe what they observe:
Butane belongs to the homologous series called the alkanes. What is the name of the homologous series that butene belongs to?
Octane, C8H18\text{C}_8\text{H}_{18}C8H18, is an alkane found in petrol. Octane undergoes complete combustion in excess oxygen, O2\text{O}_2O2. Carbon dioxide and water are made. Write the balanced symbol equation for the complete combustion of octane.