Question 1

Which element is represented by the Lewis dot symbol shown in image 3?

Accepted Answer

Aluminum

Question 2

Refer to image 2. What is the molecular geometry of dichloromethane (CH2Cl2)? Is the molecule polar or nonpolar?

Accepted Answer

Tetrahedral; polar

Question 3

Which of the following bonds is nonpolar?

Accepted Answer

C–H

Question 4

What is the electron geometry and molecular geometry of XeF4, as shown in image 8?

Accepted Answer

Electron geometry = octahedral; molecular geometry = square planar

Question 5

Which molecule contains a double bond?

Accepted Answer

CO2

Question 6

Based on the bond energies in image 7, which of the following bonds is the strongest?

Accepted Answer

H–F

Question 7

What is the hybridization of carbon in HCN?

Accepted Answer

sp

Question 8

Which of the following molecules is polar?

Accepted Answer

CH3OH

Question 9

What is the molecular geometry of the carbonate ion, $$CO3^{2-}$$?

Accepted Answer

Trigonal planar

Question 10

How many sigma bonds and pi bonds are found in a carbon dioxide (CO2) molecule?

Accepted Answer

Two sigma bonds and two pi bonds

Question 11

Which orbitals in the sulfur atom hybridize to form the SF6 molecule?

Accepted Answer

3s and 3p

Question 12

What is the bond order for H2 based on the molecular orbital diagram in image 6?

Accepted Answer

$$	ext{Bond order} = 1$$

Question 13

Which of the following molecules does NOT have a net dipole moment?

Accepted Answer

CCl4

Question 14

Why is carbon tetrachloride (CCl4) a nonpolar molecule despite the carbon-chlorine bond being polar?

Accepted Answer

The tetrahedral geometry causes the dipole moments to cancel.

Question 15

What is the hybridization of nitrogen in ammonia (NH3)?

Accepted Answer

sp3

Question 16

Which of the following statements about bond energies is INCORRECT?

Accepted Answer

The bond energy associated with a particular bond will be the same across all molecules that contain that bond.

Question 17

What is the electron geometry and molecular geometry for H2S?

Accepted Answer

Electron geometry = tetrahedral; molecular geometry = bent

Question 18

Which of the following bonds would result in a partial positive charge on the C atom: C–H, C–O, C–S, C–Cl, C–N?

Accepted Answer

1

Question 19

Which of the following molecules has a net dipole moment?

Accepted Answer

NH3

Question 20

What is the hybridization for the three atoms marked as a, b, and c in the molecule shown in image 11?

Accepted Answer

a = sp3, b = sp2, c = sp3

General Chemistry: Chemical Bonding, Hybridization, and Molecular Structure Study Guide

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