Directions: Find the Percentage Composition of Each Compound Listed Below

Name: Period:

Percent Composition – Level 1

Directions: Find the percentage composition of each compound listed below.

1. What is the percentage composition of an ore which contains 1.85 g of aluminum and 1.65 g of oxygen?

2. A compound of silver contains 4.35 g of that metal combined with 0.65 g of sulfur. What is the percentage composition of this compound?

3. A certain sample of gas weighing 22.8 g contains 6.22 g of carbon and an unweighed quantity of oxygen. What is the percentage composition of this gas?

4. A compound consisting of aluminum and chlorine weighs 17.82 grams. The aluminum in the compound weighs 3.6 grams. What is the weight of chlorine in the compound? What is the percentage composition of the compound?

Name the following compounds and then calculate the percentage composition of each atom in that compound. Consider checking your work with wolframalpha.

5. FeO

6. MgCl2

7. CH4

8. CS2

9. NO2

10. HgO

11. SnI4

12. Cu2O

13. NH3

14. CH2O