CH 221 Online Extra Credit Problems

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Chapter One: Essential Ideas

  1. Significant Figures
  2. Scientific Notation
  3. Predicting Exponents
  4. Direct and Inverse Relationships
  5. Direct/Inverse Problems
  6. General 3 Variable #1
  7. General 3 Variable #2
  8. General 3 Variable #3
  9. Percentages
  10. Mass, Density and Volume
  11. Converting Volume
  12. Converting Mass
  13. Converting Distance
  14. Converting Density
  15. Converting Temperature
  16. Metric Conversions
  17. More Metric Conversions

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Chapter 2: Atoms, Molecules and Ions

  1. Protons, Electrons and Neutrons

Chapter 3: Electronic Structure and Periodic Properties of Elements

  1. Wavelength, Frequency and Energy
  2. Atomic Spectrum of Hydrogen
  3. The de Broglie Wave Equation
  4. Electronic Structures of Atoms and Ions
  5. The Quantum Numbers
  6. Simple Nomenclature - Formulas to Names
  7. Simple Nomenclature - Names to Formulas
  8. Transition Metal Nomenclature
  9. Elements, Moles and Mass
  10. Calculating the Molar Mass of a Compound
  11. Mass, Moles and gfw
  12. Word Problems - Elements and Moles
  13. Chemical Formulas and Mass Relationships
  14. Calculations based on Chemical Formulas
  15. Using Molar Volume
  16. Density, Elements, Mass and Moles
  17. Exercises in Comparison
  18. Further Exercises in Comparison
  19. Additional Exercises in Comparison

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Chapter 4: Chemical Bonding and Molecular Geometry

  1. Lewis Structures Informational Only
  2. Using Bond Enthalpies
  3. Born-Haber Cycles
  4. Dipole Moments

Chapter 5: Advaned Theories of Bonding

  1. Hybridization
  2. Hybrid Orbitals

Chapter 6: Composition of Substances and Solutions

  1. Percent Composition
  2. Empirical Formulas From Percent Composition
  3. Molarity, Moles and Volume
  4. Molarity, Mass and Volume
  5. Dilution

Chapter 7 Part I (7.1-7.2 only): Stoichiometry of Chemical Reactions

  1. Balancing Chemical Reactions
  2. Mixing Soluble Salts
  3. Oxidation Numbers
  4. Identifying Redox Components

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