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Useful shorter hydrocarbons can be produced by the cracking of larger alkanes obtained from crude oil.

The chemical equation shows the cracking of one molecule of dodecane to produce one molecule of pentene and one molecule of another hydrocarbon product.

C12H26→C5H10+CxHy \text{C}_{12}\text{H}_{26} \rightarrow \text{C}_5\text{H}_{10} + \text{C}_x\text{H}_y C12​H26​→C5​H10​+Cx​Hy​

Calculate the values of x x\,x and y y\,y in CxHy\text{C}_x\text{H}_yCx​Hy​.

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Fuels Questions

Practise Edexcel GCSE Chemistry Fuels with exam-style questions for Foundation and Higher tier. 100 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.

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