The table below shows some information about two alkanes, butane and pentane.
| Name of alkane | Molecular formula | Structure |
|---|---|---|
| Butane | (i) | HHHH∣∣∣∣H−C−C−C−C−H∣∣∣∣HHHH\begin{array}{ccccccccccc} & & \text{H} & & \text{H} & & \text{H} & & \text{H} & & \\ & & \vert{} & & \vert{} & & \vert{} & & \vert{} & & \\ \text{H} & - & \text{C} & - & \text{C} & - & \text{C} & - & \text{C} & - & \text{H} \\ & & \vert{} & & \vert{} & & \vert{} & & \vert{} & & \\ & & \text{H} & & \text{H} & & \text{H} & & \text{H} & & \end{array}H−H∣C∣H−H∣C∣H−H∣C∣H−H∣C∣H−H |
| Pentane | C5H12\text{C}_5\text{H}_{12}C5H12 | (ii) |
Complete the table by providing:
The molecular formula for butane at (i).
The fully displayed structure of pentane at (ii), showing all covalent bonds.
Practise Edexcel GCSE Chemistry Hydrocarbons with exam-style questions for Foundation and Higher tier. 34 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
