AP Chemistry Unit 3 Review

Front

What is a dipole moment?

Back

A dipole moment is a measure of the separation of positive and negative charges in a molecule, indicating the polarity of the molecule.

Front

Which of the following molecules has a measurable dipole moment: SO3, CCl4, PF3, BH3?

Back

PF3 has a measurable dipole moment due to its trigonal pyramidal shape.

Front

What is the formal charge on the oxygen atom in dinitrogen monoxide (N2O) with the structure N=N=O?

Back

The formal charge on the oxygen atom is zero.

Front

What type of bonding is found within a water molecule?

Back

Water molecules exhibit polar covalent bonding.

Front

What is the hybridization and molecular geometry of phosphorus tribromide (PBr3)?

Back

Phosphorus tribromide has sp3 hybridization and a trigonal pyramidal molecular geometry.

Front

What is the hybridization of carbon atoms in alanine?

Back

Each carbon atom in alanine is sp3 hybridized.

Front

How many sigma and pi bonds are present in alanine?

Back

Alanine contains 12 sigma bonds and 6 pi bonds.

Front

What is the significance of hybridization in molecular geometry?

Back

Hybridization helps explain the shape and bond angles of molecules based on the mixing of atomic orbitals.

Front

Define polar covalent bond.

Back

A polar covalent bond is a type of chemical bond where a pair of electrons is unequally shared between two atoms, leading to a dipole moment.

Front

What is the difference between ionic and covalent bonding?

Back

Ionic bonding involves the transfer of electrons from one atom to another, while covalent bonding involves the sharing of electrons between atoms.