A sample of common salt has `45.5%` chlorine. What is the weight percentage of pure sodium chloride in the sample?

Explanation

To find the weight percentage of pure sodium chloride (NaCl) in a sample that has 45.5% chlorine, we can follow these steps:

### Step-by-Step Solution:

1. **Determine the Molecular Weight of NaCl:**
- The atomic mass of Sodium (Na) = 23 g/mol
- The atomic mass of Chlorine (Cl) = 35.5 g/mol
- Therefore, the molecular weight of NaCl = 23 g/mol + 35.5 g/mol = 58.5 g/mol
...