A hydrocarbon of molecular weight `72gmol^(-1)` has a 2-methyl group. What is the IUPAC name? Also drawn its bond-line structure?

Explanation

To solve the problem of determining the IUPAC name and drawing the bond-line structure of a hydrocarbon with a molecular weight of 72 g/mol and a 2-methyl group, we can follow these steps:

### Step 1: Determine the Base Structure
The molecular weight of the hydrocarbon is given as 72 g/mol. Since it contains a 2-methyl group, we can start by considering the longest carbon chain that can accommodate this group.

### Step 2: Calculate the Number of Carbons
The molecular weight of carbon (C) is approximately 12 g/mol. To find out how many carbon atoms can fit into the molecular weight of 72 g/mol, we can set up the following equation:
- Let \( n \) be the number of carbon atoms.
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