Molecular Geometry of CO2

The video tutorial explains the concept of steric number and its role in determining the molecular geometry of molecules, using CO2 as an example. It begins with the Lewis structure of CO2, identifying the central carbon atom and the two oxygen atoms bonded to it. The steric number is calculated as two, indicating a linear molecular geometry with a bond angle of 180 degrees. The tutorial concludes by summarizing that CO2 has a steric number of two with no lone pairs, resulting in a linear shape.

What is the primary purpose of determining the steric number in a molecule?

• To find the molecular weight

• To determine the molecular geometry

• To identify the type of chemical bonds

• To calculate the number of electrons

In the Lewis structure of CO2, which atom is the central atom?

• Hydrogen

• Nitrogen

• Oxygen

• Carbon

How many oxygen atoms are bonded to the central carbon atom in CO2?

• Four

• Three

• Two

• One

What is the steric number of CO2?

• One

• Two

• Three

• Four

What is the molecular geometry of CO2 based on its steric number?

• Linear

• Trigonal planar

• Tetrahedral

• Bent

What is the bond angle in a linear molecular geometry like CO2?

• 90 degrees

• 360 degrees

• 120 degrees

• 180 degrees

What is the steric number of CO2 when there are no lone pairs on the central atom?

• One

• Two

• Four

• Three