Author: Anonymous

  Bond Energies  (kJ/mol) Bond  Bond Energy Bond  Bond Energy Bond  Bond Energy Bond  Bond Energy H-H 436 N-O 200 F-Cl 255 F-F 160 H-C 415 N-F 270 F-Br 235 F-Si 540 H-N 390 C-Si 360 Si-Si 230 F-P 489 H-O 464 H-Br 370 Si-P 215 F-S 285 H-F 569 H-I 295 Si-S 225 Si-Cl 359 H-SI 395 C-C 345 N-P 210 Si-Br 290 H-P 320 C=C 611 N-Cl 200 Si-I 215 H-S 340 C

Match the following terms with their definitions. Write ONLY the NUMBER that is in the column on the left of the definitions in the answer field next to each term.  (There are more definitions than needed.)   Terms:  nonpolar covalent bond – [9] ideal gas- [8] lattice energy – [10] hybridization- [1]   Definitions:    1 model that describes the changes in the atomic orbitals of an atom when it forms a covalent compound 2 covalent bond formed by overlap of atomic orbitals along the internuclear axis 3 volume of 1 mole of gas at STP, approximately 22.4 L for gases behaving ideally 4 covalent bond in which electrons are not shared equally 5 force exerted per unit area 6 covalent bond formed by side-by-side overlap of atomic orbitals 7 tendency of an atom to attract electrons in a bond to itself 8 hypothetical gas whose physical properties are perfectly described by the gas laws 9 covalent bond in which electrons are shared equally or almost equally 10 energy required to separate one mole of an ionic solid into its component gaseous ions  

Answer True (T) or False (F):  The SiF4  molecule is polar.  [a] The bromine atom in the bromodifluoride anion, BrF2-, is sp3d – hybridized.  [b] Consider the following partial Lewis Dot Structure:        Br-F .  (each element has 3 lone-pair electrons not shown).     The singe bond shared between them is a  polar bond and the more negative atom is Br.   [c]

Match the following terms with their definitions. Write ONLY the NUMBER that is in the column on the left of the definitions in the answer field next to each term.  (There are more definitions than needed.)   Terms:  electronegativity – [7] lattice energy- [10] pressure – [5] sigma bond- [2]   Definitions 1 model that describes the changes in the atomic orbitals of an atom when it forms a covalent compound 2 covalent bond formed by overlap of atomic orbitals along the internuclear axis 3 volume of 1 mole of gas at STP, approximately 22.4 L for gases behaving ideally 4 covalent bond in which electrons are not shared equally 5 force exerted per unit area 6 covalent bond formed by side-by-side overlap of atomic orbitals 7 tendency of an atom to attract electrons in a bond to itself 8 hypothetical gas whose physical properties are perfectly described by the gas laws 9 covalent bond in which electrons are shared equally or almost equally 10 energy required to separate one mole of an ionic solid into its component gaseous ions  

“Students self-selected into the workshop. Based on this design, causal conclusions are:”

A researcher investigated whether attending a voter workshop influences whether students plan to vote. Which research hypothesis best matches this study?

State the molecular geometry of the following molecules (more matching provided than needed):  IF5 NH4+ (ammonium ion) SF2

Answer the questions in the table regarding the Lewis structure below:   Questions What is the total number of 

Section 3: Story Problems Directions: This section will contain four story problems with subsequent questions corresponding to each short story.

Below are two additional essay questions which may be answered for extra credit.