1. Chapter 10 Whiteboard Review Questions

2. What is the percent composition of phosphoric acid (H3PO4)
What is the percent composition of phosphoric acid (H3PO4)? (for all 3 elements individually)

3. What is the percent composition of phosphoric acid (H3PO4)
What is the percent composition of phosphoric acid (H3PO4)? (for all 3 elements individually)
H = 3.08% P = 31.61%
O = 65.31%

4. Which has the larger percent by mass of sulfur. H2SO3 or H2S2O8?

5. Which has the larger percent by mass of sulfur. H2SO3 or H2S2O8?

6. Calcium chloride (CaCl2) is sometimes used as a de-icer
Calcium chloride (CaCl2) is sometimes used as a de-icer. Calculate the percent by mass of each element in CaCl2.

7. Calcium chloride (CaCl2) is sometimes used as a de-icer
Calcium chloride (CaCl2) is sometimes used as a de-icer. Calculate the percent by mass of each element in CaCl2. Ca = 36.11%
Cl = 63.89%

8. Determine the empirical formula for a compound that contains 63
Determine the empirical formula for a compound that contains 63.16% O and 36.84% N.

9. Determine the empirical formula for a compound that contains 63
Determine the empirical formula for a compound that contains 63.16% O and 36.84% N.
N2O3

10. Determine the empirical formula for a compound that contains 35
Determine the empirical formula for a compound that contains 35.98% aluminum (Al) and 64.02% sulfur (S).

11. Determine the empirical formula for a compound that contains 35
Determine the empirical formula for a compound that contains 35.98% aluminum (Al) and 64.02% sulfur (S). Al2S3

12. Propane is a hydrocarbon, a compound composed only of carbon and hydrogen. It is 81.82% carbon and 18.18% hydrogen. What is the empirical formula?

13. Propane is a hydrocarbon, a compound composed only of carbon and hydrogen. It is 81.82% carbon and 18.18% hydrogen. What is the empirical formula?
C3H8

14. A compound was found to contain 49. 98 g of carbon and 10
A compound was found to contain g of carbon and g of hydrogen. The molar mass of the compound is g/mol. Determine the molecular formula.

15. A compound was found to contain 49. 98 g of carbon and 10
A compound was found to contain g of carbon and g of hydrogen. The molar mass of the compound is g/mol. Determine the molecular formula.
C4H10

16. A colorless liquid composed of 46. 68% nitrogen and 53
A colorless liquid composed of 46.68% nitrogen and 53.32% oxygen has a molar mass of g/mol. What is the molecular formula?

17. A colorless liquid composed of 46. 68% nitrogen and 53
A colorless liquid composed of 46.68% nitrogen and 53.32% oxygen has a molar mass of g/mol. What is the molecular formula?
N2O2

18. When an oxide of potassium is decomposed, 19. 55 g of K and 4
When an oxide of potassium is decomposed, g of K and 4.00 g of O are obtained. What is the empirical formula for the compound?

19. When an oxide of potassium is decomposed, 19. 55 g of K and 4
When an oxide of potassium is decomposed, g of K and 4.00 g of O are obtained. What is the empirical formula for the compound?
K2O

20. The pain reliever, morphine, has 17. 900 g carbon, 1. 680 hydrogen, 4
The pain reliever, morphine, has g carbon, hydrogen, oxygen, nitrogen. Determine the empirical formula of morphine.

21. The pain reliever, morphine, has 17. 900 g carbon, 1. 680 hydrogen, 4
The pain reliever, morphine, has g carbon, hydrogen, oxygen, nitrogen. Determine the empirical formula of morphine.
C17H19O3N

22. Ricinine is one of the poisonous compounds found in the castor plant
Ricinine is one of the poisonous compounds found in the castor plant. It is 58.54% carbon, 4.91% hydrogen, 17.06% nitrogen, and 19.49% oxygen. Its molar mass is g/mol. Determine molecular formula.

23. Ricinine is one of the poisonous compounds found in the castor plant
Ricinine is one of the poisonous compounds found in the castor plant. It is 58.54% carbon, 4.91% hydrogen, 17.06% nitrogen, and 19.49% oxygen. Its molar mass is g/mol. Determine molecular formula.
C8H8N2O2

24. The compound borazine consists of 40. 29% boron, 7
The compound borazine consists of 40.29% boron, 7.51% hydrogen, and 52.20% nitrogen, and its molar mass is g/mol. Calculate the molecular formula for borazine.

25. The compound borazine consists of 40. 29% boron, 7
The compound borazine consists of 40.29% boron, 7.51% hydrogen, and 52.20% nitrogen, and its molar mass is g/mol. Calculate the molecular formula for borazine.
B3H6N3

26. The composition of silver oxalate is 71. 02% silver, 7
The composition of silver oxalate is 71.02% silver, 7.91% carbon, and 21.07% oxygen. If the molar mass of silver oxalate is g/mol, what is its molecular formula?

27. The composition of silver oxalate is 71. 02% silver, 7
The composition of silver oxalate is 71.02% silver, 7.91% carbon, and 21.07% oxygen. If the molar mass of silver oxalate is g/mol, what is its molecular formula?
Ag2C2O4

28. Triethylenemelamine is used in the plastics industry and as an anticancer drug. Its analysis is 52.93% carbon, 5.92% hydrogen, and 41.15% nitrogen. The molar mass of triethylenemelamine is g/mol. Determine its molecular formula.

29. Triethylenemelamine is used in the plastics industry and as an anticancer drug. Its analysis is 52.93% carbon, 5.92% hydrogen, and 41.15% nitrogen. The molar mass of triethylenemelamine is g/mol. Determine its molecular formula. C9H12N6