Percent Composition of Sodium Chloride (NaCl)
NaCl (molar mass 58.44 g/mol) is 39.34% sodium and 60.66% chlorine by mass.
How to use this tool
- Enter h contribution, c contribution, n contribution, o contribution and other elements contribution in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your total molar mass and the full breakdown beneath it.
Calculate the percent composition of sodium chloride using the other-elements field for Na and Cl.
Frequently asked questions
- What does percent composition mean?
- It tells you what fraction (by mass) of a compound is made of each element. For example, water is about 11.2% hydrogen and 88.8% oxygen by mass.
- How do I find the element contribution?
- Multiply the element's atomic mass (from the periodic table) by the number of atoms of that element in the chemical formula.