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Chemistry · Paper 2 · Foundation + Higher · C7

Read and use alkane formulae

Key ideas1 of 3

Use the general formula

For alkanes, the general formula is CₙH₂ₙ₊₂. The letter n is the number of carbon atoms. If n = 3, hydrogen atoms = 2 × 3 + 2 = 8, so the formula is C₃H₈.

Alkane general formula CₙH₂ₙ₊₂. Three carbon atoms give eight hydrogen atoms, C₃H₈.

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