Multiple choice

What is the molecular formula of pentane?

  1. C2H6

  2. C3H8

  3. C4H10

  4. C5H12

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pentane is a 5-carbon alkane, and all alkanes follow the formula CnH2n+2. For n=5, this gives C5H12. The other options represent ethane, propane, and butane respectively.