1. Understanding Moles and % Composition
Intro to Empirical and Molecular Formulas

2. What is the mass of 1 mol of Chlorine?
What term describes this measurement?

3. What is the molar mass of chlorine Gas?

4. What is the molar mass of HCl?

5. What is the molar mass of water?

6. What is the chemical equation for water?
How many moles of Hydrogen and oxygen gas, and water are present?

7. Molar mass= mass of 1 mol What is the molar mass of the compound
Al2(SO4)3?
What is the molar mass of
2 Al2(SO4)3?

8. % composition
What is the % composition of water?

9. Could you determine the formula of a compound given the % composition of the compound?

10. Empirical Formula
Is the smallest WHOLE number ratio for a compound.

11. Empirical formula for water

12. Methyl Acetate is a solvent commonly used in some paints, inks and adhesives. Determine the empirical formula for methyl acetate, which has the following chemical analysis: % Carbon, 8.16% Hydrogen and 43.20% oxygen.

13. Share responses from yesterday’s warm-up!!!

14. Determine the % composition of glucose.
Use those percentages to determine the empirical formula.
What do you notice?

15. Molecular formula
Specifies the actual number of moles in a compound.

16. Molecular formula of Glucose
What is the mass of the empirical formula of glucose?
What is the MOLAR mass of glucose?
Divide your molar mass of glucose by the mass of your empirical formula.
What is the relationship?
Distribute across the empirical formula!

17. Homework Unit 5- Worksheet 3 Attached on Engrade Calendar
ed via Engrade as well