Practice Final - 1(20 pt Match the definitions to the type...

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1 1. (20 pt) Match the definitions to the type of energy: a. amount of energy required to remove an electron from the surface of a metal b. amount of energy required to remove an electron from a gas phase atom c. amount of energy associated with the addition of an electron to a gas phase atom d. amount of energy needed to raise the temperature of a sample by one degree Celsius e. amount of energy required to change a solid to a liquid f. amount of energy required to change a liquid to a vapor g. amount of energy required to change a solid to a vapor h. amount of energy required to break a covalent association between two atoms i. amount of energy associated with the production of an ionic solid j. amount of energy associated with the production of a substance from its elements Enthalpy of Formation _______ Electron Affinity _______ Enthalpy of Vaporization _______ Specific Heat _______ Lattice Energy _______ Enthalpy of Fusion _______ Enthalpy of Sublimation _______ Bond Energy _______ Ionization Energy _______ Work Function _______ 2. (10 pt) What is the maximum number of electrons that have the following designations in an atom? a. n = 2, m s = -1/2 ______________ b. n = 6, l = 6 ______________ c. n =5, l = 3 ______________ d. n = 4, l = 3, m l = -3 ______________ e. n = 3, l = 1, m 1 = 0 ______________
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2 3. (15 pt) Give the electron configurations for the following elements or ions. How many unpaired electrons are in each atom or ion? Electron Configuration Unpaired Electrons Ca 2+ _________________________________________________ _________________ Bi _________________________________________________ _________________ S _________________________________________________ _________________ 4. (12 pt) Fill in the table below, assuming each column represents a neutral atom: Symbol ( X A Z ) Protons 25 82 Neutrons 30 64 Electrons 48 56 Mass Number 137 207
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3 5. (10 pt) A 17.92 g sample of iron(III) sulfate is dissolved in enough water to make a 234 mL stock solution. 30.0 mL of the stock solution is added to 100.0 mL of water. Calculate the concentrations of the iron and sulfate ions in the final solution.
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