The general formula for the alkanes is CnH2n+2, where n is the number of carbon atoms in the molecule.
The formula will be C10H22. This is because n = 10. So, 2n + 2 = (2 × 10) + 2 = 20 + 2 = 22.
Hexane is an alkane. Its molecules contain six carbon atoms. Predict the molecular formula of hexane.
The formula will be C6H14.
The table shows four alkanes, their molecular formulae and their structures.
The ball and stick models on the right show that the covalent bonds are not really at angles of 90°, as shown in the structures.
The alkanes are saturated hydrocarbons: