Question

What is the number of moles of 'C' and 'H' atoms respectively present in n mole molecule represented by following structure?

• A. $6n$ and $6n$
• B. $6n$ and $8n$
• C. $8n$ and $8n$
• D. $7n$ and $9n$

Hint:

In skeleton structures, remember that each vertex is a Carbon and each Carbon must have 4 bonds.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
The image represents Styrene (Vinylbenzene). We need to determine the count of Carbon and Hydrogen atoms for \( n \) moles of the compound.
Step 2: Detailed Explanation:
1. The structure is \( C_6H_5 - CH = CH_2 \).
2. Counting carbons: 6 carbons in the ring + 2 carbons in the vinyl group = 8 carbon atoms.
3. Counting hydrogens: 5 hydrogens on the ring (one position is substituted) + 3 hydrogens on the vinyl group = 8 hydrogen atoms.
4. Molecular formula is \( C_8H_8 \).
5. For 1 mole, there are 8 moles of \( C \) and 8 moles of \( H \).
6. For \( n \) moles, there are \( 8n \) moles of \( C \) and \( 8n \) moles of \( H \).
Step 4: Final Answer:
The number of moles of \( C \) and \( H \) are \( 8n \) and \( 8n \) respectively.