Question 119 of 185 in Introduction to Organic Chemistry

Structural isomerism in the alkanes

1 mark · Easy

Give the molecular formula for the straight-chain alkane with five carbon atoms.

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C5H12

Also accept: C5H12

Common mistakes: C5H10; C4H10

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Marking points

B1 · 1 mark · Correct molecular formula: C5H12

Worked solution

The straight-chain alkane with five carbon atoms is pentane. Its molecular formula is C5H12.

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