CHEMISTRY 231 STUDY GOALS AND HOMEWORK Chapter 3 – Mass Relationships in Chemical Reactions (Chang 9th Ed) 1. Define atomic mass, atomic mass unit and average atomic mass. Calculate the average atomic mass of an element from its isotopic composition. Section 3.1 Problems: 3.1-3.4, 3.6-3.8 2. Define the term “mole”. Explain the relation between Avogadro’s number and molar mass of elements. Be able to calculate the number of moles of atoms, mass of atoms , and the number of atoms for elements. . Section 3.2. See Figure 3.2 page 81 Problems: 3.9, 3.10, 3.13-3.18, 3. Calculate the Molar Mass (M) of compounds. Use Avogadro’s number and the molar mass to calculate the number of molecules in a given mass of a compound and the number of atoms in a given mass of a compound. Section 3.3, Problems; 3.24- 3.26 3.28, 3.30 4. Describe the operation of a mass spectrometer and how isotopic abundance of an element is determined from its mass spectrum. Section 3.4 Reading Assignment
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This note was uploaded on 04/18/2008 for the course CHEM 231 taught by Professor Pritchett during the Fall '07 term at Tuskegee.