CHAPTER 3 LEARNING OBJECTIVES
To satisfy the minimum requirements for this course, you should be able to:
1. Perform calculation involving the masses of atoms and molecules. Examples include:
calculate the average atomic mass (in amu) or molar mass (in g/mol) of an element given the
abundances and masses of its isotopes. Pg 76, Prob 3.6, SG41
2. Calculate the molecular mass or formula mass (in amu) and molar mass (in g/mol) of a
substance from its chemical formula. Pg 76, Prob 3.8, 3.24, SG42
3. Interconvert number of molecules, number of moles, and mass of a substance. Pg 79, Prob
3.14, 3.16, 3.20, SG42
4. Determine the percent composition by mass of its component elements given the
molecular or empirical formula of a compound. Pg 88, Prob 3.40, 3.42, SG44.
5. Determine the empirical formula for a compound given its percent composition by mass.
Pg 89, Prob 3.50, SG45
6. Determine the molecular formula of a compound given the empirical formula and
molecular weight. Pg. 89, Prob 3.52
Understand the concept of stoichiometry and be able to:
1. Write balanced chemical equations including states. Pg 91-92, Prob 3.60, SG46
2. Calculate the amount (in moles or grams) of a particular substance produced or used in a
chemical reaction. Pg 95-97, Prob 3.64, 3.66, SG47
3. Identify the limiting and excess reagents in a reaction mixture and determine the amount
(in moles or grams) of excess reagent(s) remaining at the end of a reaction. Pg 99, Prob 3.82, 3.84,
SG48
4. Calculate the theoretical yield, actual yield, and percent yield for a chemical reaction. Pg
103, Prob 3.90, 3.94, SG49