CH. 5 CHEMISTRY MINI EXAM

Complete the MO diagram (below) to determine if OF⁻ is paramagnetic or diamagnetic - classwork Oct 25, question 7

diamagnetic

Draw the Lewis structure of IF₅ and then determine its electron domain and molecular geometries.

octahedral/square pyramidal

Draw the Lewis structure of BeF₂ and then determine the ideal bonding angle(s) of the central atom.

180

Determine the number of chiral centers in the compound shown here - homework question 21

2

Consider the MO diagram below for these diatomic species. Rank the following diatomic molecules in order of bond length (from smallest to largest). - classwork Oct 25, question 6

A

A π bond could be formed from the overlap of which two orbitals? A) two sp² hybrid orbitals B) a 1s and a sp² hybrid orbital C) a sp and a sp² hybrid orbitals D) two unhybridized p orbitals

D) two unhybridized p orbitals

What is the correct molecular geometry of NH₃ according to Valence Shell Electron Pair Repulsion Theory?

Trigonal pyramidal

Complete the MO diagram (below) to determine if I₂ is paramagnetic or diamagnetic. - homework question 24

diamagnetic

A Lewis structure for IF₄⁺ is shown below on the left. Predict whether bonding angle A will be equal to, greater than, or less than the ideal bonding angle according to the VSEPR model.

less than

A Lewis structure for ozone (O₃) is shown below on the left. Predict whether bonding angle A will be equal to, greater than, or less than the ideal bonding angle according to the VSEPR model. - homework question 9

less than

A Lewis structure for the molecule 1,4-dichlorobenzene (C₆H₄Cl₂) is shown below. Based on this structure, determine if the molecule is polar or nonpolar. - homework question 11

non polar

One of the molecular orbitals of SCN⁻ is shown below. Identify the type of orbital. - classwork Oct 25, question 1

pi

A Lewis structure for one isomer C₂H₂F₂ is shown below. Based on this structure, determine if the molecule is polar or nonpolar - homework question 10

polar

Draw the Lewis structure of CH₃F and then determine if the molecule is polar or nonpolar.

polar

Draw the Lewis structure of formaldehyde (H₂CO) and then determine if the molecule is polar or nonpolar

polar

Which set of hybrid orbitals is represented by the picture below? - classwork Oct 18, question 1

sp

Draw the Lewis structure of SO₃ (by following the octet rule on all atoms) and then determine the hybridization of the central atom.

sp2

What is the hybridization of all the carbon atoms in benzene (C₆H₆)?

sp2

Draw the Lewis structure of CH₂CCH₂ and then choose the appropriate set of pair hybridization states for the three central atoms. Your answer choice is independent of the orientation of your drawn structure.

sp2/sp/sp2

Draw the Lewis structure of SCl₂ and then determine the hybridization of the central atom.

sp3

Draw the Lewis structure of acetic acid (CH₃COOH) and then choose the appropriate set hybridization states for the two central carbon atoms. Your answer choice is independent of the orientation of your drawn structure

sp3/sp2

Draw the Lewis structure of IF₅ and then determine the hybridization of the central atom.

sp3d2

Draw the Lewis structure of acetaldehyde (CH₃CHO) and then choose the appropriate pair of molecular geometries of the two central atoms. Your answer choice is independent of the orientation of your drawn structure.

tetrahedral/ trigonal planar

Draw the Lewis structure of acetonitrile (CH₃CN) and then choose the appropriate pair of molecular geometries of the two central atoms. Your answer choice is independent of the orientation of your drawn structure.

tetrahedral/liner

Draw the Lewis structure of CBr₄ and then determine its electron domain and molecular geometries.

tetrahedral/tetrahedral

Draw the Lewis structure of ozone (O₃) and then determine its electron domain and molecular geometries

trigonal planar/bent (120)

What is the bond order of H₂⁺?

0.5

How many chiral centers are in the compound shown here? - homework question 22

1

In sp²-hybridized orbitals, how many p-orbitals remain to form multiple bonds?

1

Chloroform, also called trichloromethane, (CHCl₃) is an important laboratory solvent with a relatively high vapor pressure at room temperature. Draw the Lewis structure of CHCl₃ and then determine the ideal bonding angle(s) for the Cl-C-Cl bond(s)

109.5

Draw the Lewis structure of SeOF₂ (with minimized formal charges) and then determine the ideal bonding angle(s) of the central atom

109.5

How many σ bonds are in the structure of the organic molecule below? - classwork Oct 18, question 7

16

Use the MO diagram (below) to calculate the bond order for CO - classwork Oct 25, question 2

3

Use the MO diagram (below) to calculate the bond order for C₂²⁻ - classwork Oct 25, question 3

3

How many π bonds are in the structure of the organic molecule below? - homework question 18

4

How many π bonds are present in the structure of ibuprofen shown? - classwork Oct 18, question 8

4

Draw the Lewis structure of BrCl₄⁻ and then determine the ideal bonding angle(s) of the central atom

90

Draw the Lewis structure of BrF₃ and then determine the ideal bonding angle(s) of the central atom.

90

Draw the Lewis structure of AsF₅ and then determine the ideal bonding angle(s) of the central atom.

90 and 120

What does the ring in the center of a benzene molecule represent? A) It means the π electrons are delocalized around the benzene ring. B) It means the π protons are delocalized around the benzene ring. C) It means the σ electrons are delocalized around the benzene ring. D) It means the σ protons are delocalized around the benzene ring.

A) It means the π electrons are delocalized around the benzene ring.

Consider the MO diagrams for these diatomic species. Rank the following diatomic species in order of bond dissociation energy (from smallest to largest). - classwork Oct 25, question 5

B

Which one of the following statements is FALSE? A) An sp orbital is made from combining an s and one p orbital B) Pi bonds are formed from the overlap of hybrid orbitals C) Atoms which have sp³d hybridization must be in the third period of the Periodic table or below D) The combination of an s and three p orbitals results in the formation of four sp³ orbitals with angles of 109.5º E) The type of hybrid orbitals on an atom are determined by the number of electron domains needed to form the molecule

B) Pi bonds are formed from the overlap of hybrid orbitals

Which hybrid orbitals overlap in the C - O bond in CF₂O

Csp² - Osp²

Identify the overall molecular dipole moment of water using a vector arrow. - classwork Oct 16, question 6

D

Which molecule contains sp hybridized orbitals? A) C₂H₆ B) CH₄ C) C₂H₄ D) C₃H₄

D) C₃H₄

Which of the following molecules is considered most stable according to molecular orbital theory? A) H₂⁻ B) H₂ C) He₂ D) He₂⁺

H2

Do the chiral classwork questions

all of them