Chemistry

Question Analysis
This question involves calculating the percent composition of sodium in sodium chloride.
The main focus is on applying the core percent composition formula to a simple ionic compound.

Key Concept Explanation
Percent composition of an element = (mass of the element in 1 mole of compound / molar mass of compound) × 100%

Step-by-Step Solution
1. Mass of Na in NaCl = 22.99 g/mol
2. Molar mass of NaCl = 58.44 g/mol
3. % Na = (22.99 / 5...