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CH 101 Study Guide Test 2 Chapter 6: Identify Avogadro’s number and convert from moles to atoms, and from atoms to moles Convert from grams to moles and moles to grams calculate formula weight What is molar mass (same as formula weight) and identify its units (g/mol) Calculate the mass percent of an element in a compound Chapter 7 Identify indicators of a chemical change Know the difference between a physical and chemical change (and examples) Identify compounds that are soluble or insoluble What happens when an ionic compound is added to water Balance a chemical equation Identify spectator ions Identify specific types of reactions (synthesis, decomposition, single or double displacement, combustion) Chapter 8 What is stoichiometry and why is it useful Convert moles of one compound to moles of another Identify conversion factors Convert grams of one compound to grams of another using a balanced equation Know what the limiting reactant , actual yield and theoretical yield are Know the formula for percent yield Calculate the heat generated in a reaction (using the coefficients from the equation) Chapter 9 What is wavelength and frequency What happens when an atom absorbs energy How many electrons can each shell hold (s=2,p=6,d=10,f=14) Write the electron configuration for an element Know the periodic trend of the atomic radius Identify the trend in ionization energy