Name: ______________________________________
Percent Composition Problems
Determine the percent composition of the listed element in the compound. Pay special attention to significant figures.
Make sure you have the correct compound formula before you begin each problem.
1. What is the percentage, by mass, of phosphorus in Iron (III) phosphate?
2. What is the percentage, by mass, of oxygen in Aluminum carbonate?
3. What is the percentage, by mass, of chlorine in Calcium chloride?
4. What is the percentage, by mass, of lead in Lead (II) nitrate?
5. What is the percentage, by mass, of sodium in Sodium phosphate?
6. What is the percentage, by mass, of sulfur in Aluminum sulfate?
7. What is the percentage, by mass, of carbon in Hexane?
8. What is the percentage, by mass, of hydrogen in Phosphoric acid?
9. What is the percentage, by mass, of oxygen in Acetic acid?
10. What is the percentage, by mass, of fluorine in Sulfur hexafluoride?
11. What is the percentage, by mass, of chromium in Lead (IV) chromate?
12. What is the percentage, by mass, of manganese in Potassium permanganate?