Chemical reactions of the alkenes
2 marks · EasyA molecule of heptene contains 14 hydrogen atoms. Calculate the number of carbon atoms in a molecule of heptene. Show your working.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
7 (±0)
Common mistakes: 8; 6
Show mark scheme and worked solution
Marking points
M1 · 1 mark · Uses or rearranges the general formula correctly: H = 2 × C.
A1 · 1 mark · Calculates C = 14 / 2 = 7 correctly.
Worked solution
So, heptene contains 7 carbon atoms.