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Could any help with this chemistry question?

486A3E89-8949-46E6-BAA6-9E909446377D.jpg.jpeg

The answer is the last one but I’m unsure of how?
Do you know the general formula for an alkane?
Reply 2
look here, it tells you about alkanes, there is a link on the page to cracking and also alkenes
https://www.science-revision.co.uk/alkanes.html
Reply 3
Original post by Okra124
486A3E89-8949-46E6-BAA6-9E909446377D.jpg.jpeg

The answer is the last one but I’m unsure of how?

The general formula for alkanes is CnH2n+2. The last molecule follows this general formula.
The general formula for alkenes is CnH2n. All the other molecules follow this general formula.

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