Exam 2 Sample Exam - Department of Chemistry CHM 1220/1225...

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Department of Chemistry CHM 1220/1225 Exam II – Sample Exam 1. Arrange the following in order of increasing ionic radius: Na + , Cl , F , S 2– 2. Write the best Lewis formula for CSe 2 . Include resonance structures if they are needed. Be sure to indicate the number of valence electrons, bonding electrons and nonbonding electrons. 3. Write the best Lewis formula for XeF 5 + . Include resonance structures if they are needed. Be sure to indicate the number of valence electrons, bonding electrons and nonbonding electrons. 4. Write the best Lewis formula for HCO 2 –– Include resonance structures if they are needed. Be sure to indicate the number of valence electrons, bonding electrons and nonbonding electrons. 5. Complete the chart below: Arrangement of regions Molecular Geometry (Shape) C OO O 2– Cl F FF F + N H H H 6. Calculate the enthalpy change for the following reaction: C O HH C O C O H + + H + H H H H C O H H
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7. Complete the chart below: Hybridization of the central atom Identify each bond as a σ -bond or π
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Exam 2 Sample Exam - Department of Chemistry CHM 1220/1225...

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