1. Determine the empirical formula of the compound containing:
63.50% silver
8.25% nitrogen
28.25% oxygen

2. Determine the empirical formula of the compound containing
52.11% carbon
13.14% hydrogen
34.75% oxygen

3. What is the molecular formula of the molecule that has an empirical formula of CH2O molar mass of g/mol?

4. A compound with a formula mass of 42.08 amu is found to be
85.64% carbon and
14.36% hydrogen by mass.
Find its molecular formula

5. Chemical analysis shows that citric acid contains 37. 51% C, 4
Chemical analysis shows that citric acid contains 37.51% C, 4.20% H, and 58.29% O. What is the empirical formula for citric acid?

6. The percent composition of diborane contain 78. 1% B and 21. 9% H
The percent composition of diborane contain 78.1% B and 21.9% H. What is the empirical formula?

7. An unknown substance contained 0. 5219g N, and 1. 4904g O
An unknown substance contained g N, and g O. Determine its empirical formula.

8. Styrene has an empirical formula of CH
Styrene has an empirical formula of CH. It has a molecular weight equal to 104 amu. Determine it’s molecular formula.

9. What is the empirical formula if the compound consist 21. 2% N 6
What is the empirical formula if the compound consist 21.2% N 6.1% H 24.2% S 48.5% O

10. Empirical formula of a substance is CH2O. Molar mass is 180
Empirical formula of a substance is CH2O. Molar mass is 180. What is the molecular formula?

11. Find the empirical formula for a substance with 88. 8% copper 11
Find the empirical formula for a substance with 88.8% copper 11.2% oxygen

12. Find the empirical formula for a substance with
40% carbon
6.7% hydrogen
53.3% oxygen

13. Find the empirical formula for a substance with
92.3% carbon
7.7% hydrogen

14. Find the empirical formula for a substance with 70. 0% iron 30
Find the empirical formula for a substance with 70.0% iron 30.0% oxygen

15. Find the empirical formula for a substance with 5. 88% hydrogen 94
Find the empirical formula for a substance with 5.88% hydrogen 94.12% oxygen

16. A compound with
empirical formula of NO2 has a
molar mass of 92 g/ml.
Find molecular formula

17. A compound with
molar mass of g/ml.
39.97% C
13.41% H
46.62% N
Find molecular formula