CHEM 111 Chapter 3 Objectives (Chang 10) Dr. Anita G. Gnezda 1. Know the names and chemical formulas for the following ions: NO 3 – NO 2 – SO 4 2– SO 3 2– PO 4 3– PO 3 3– ClO – ClO 2 – ClO 3 – ClO 4 – CO 3 2– nitrate ion nitrite ion sulfate ion sulfite ion phosphate ion phosphite ion hypo-chlorite ion chlorite ion chlorate ion perchlorate ion carbonate ion Be able to do the following: 2. Define and explain the terms atomic mass, molecular mass, molar mass, mole, and Avogadro’s Number. 3. Calculate the average atomic mass for an element from the naturally occurring isotope masses and their abundances. 4. Know that a mole refers 6.022 x 10 23 (Avogadro’s Number) particles. 5.Use appropriate conversion factors convert the mass of an element or compound to the number of moles and the number of atoms or molecules. 6. Calculate the molecular mass and molar mass of a compound from its molecular formula and a periodic table. 7. Given a molecular formula and a periodic table, calculate the percent by mass for each element in a compound.
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