Question

Identify the number of moles of H atoms present in n moles of organic compound represented as

• A. 4n
• B. 6n
• C. 8n
• D. 2n

Answer 1

Answer: (C)

8n

Answer 2

For 2-butene, the skeletal structure shows:

• Two terminal CH₃ groups: each has 3 H.
• Two central CH groups: each has 1 H.

Thus, the total H atoms per molecule = 3 + 1 + 1 + 3 = 8.

For n moles of the compound, the moles of H atoms = 8n.